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Finding the Fourth Proportional to 648,245.80, 972,368.70 and 274,220.20

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Solution

The fourth proportional to 648,245.80, 972,368.70 and 274,220.20 is: 411,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,245.80 : 972,368.70 = 274,220.20 : x
  2. Step 2: Convert to fraction form
    648,245.80/972,368.70 = 274,220.20/x
  3. Step 3: Cross multiply
    648,245.80x = 972,368.70 × 274,220.20
  4. Step 4: Simplify right side
    648,245.80x = 266,643,139,387.74
  5. Step 5: Solve for x
    x = 266,643,139,387.74/648,245.80
  6. Step 6: Final answer
    x = 411,330.30

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Half scale
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Double scale
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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.