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Finding the Fourth Proportional to 648,085.80, 972,128.70 and 648,085.80

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Solution

The fourth proportional to 648,085.80, 972,128.70 and 648,085.80 is: 972,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,085.80 : 972,128.70 = 648,085.80 : x
  2. Step 2: Convert to fraction form
    648,085.80/972,128.70 = 648,085.80/x
  3. Step 3: Cross multiply
    648,085.80x = 972,128.70 × 648,085.80
  4. Step 4: Simplify right side
    648,085.80x = 630,022,806,242.46
  5. Step 5: Solve for x
    x = 630,022,806,242.46/648,085.80
  6. Step 6: Final answer
    x = 972,128.70

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Half scale
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Double scale
Find fourth proportional to 648,086.80, 972,130.20 and 648,086.80
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.