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Finding the Fourth Proportional to 648,124.80, 972,187.20 and 274,147.80

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Solution

The fourth proportional to 648,124.80, 972,187.20 and 274,147.80 is: 411,221.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,124.80 : 972,187.20 = 274,147.80 : x
  2. Step 2: Convert to fraction form
    648,124.80/972,187.20 = 274,147.80/x
  3. Step 3: Cross multiply
    648,124.80x = 972,187.20 × 274,147.80
  4. Step 4: Simplify right side
    648,124.80x = 266,522,982,068.16
  5. Step 5: Solve for x
    x = 266,522,982,068.16/648,124.80
  6. Step 6: Final answer
    x = 411,221.70

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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.