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Finding the Fourth Proportional to 657,990.40, 987,446.40 and 284,281.60

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Solution

The fourth proportional to 657,990.40, 987,446.40 and 284,281.60 is: 426,621.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,990.40 : 987,446.40 = 284,281.60 : x
  2. Step 2: Convert to fraction form
    657,990.40/987,446.40 = 284,281.60/x
  3. Step 3: Cross multiply
    657,990.40x = 987,446.40 × 284,281.60
  4. Step 4: Simplify right side
    657,990.40x = 280,712,842,506.24
  5. Step 5: Solve for x
    x = 280,712,842,506.24/657,990.40
  6. Step 6: Final answer
    x = 426,621.49

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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.