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Finding the Fourth Proportional to 677.55, 939.81 and 654.24

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Solution

The fourth proportional to 677.55, 939.81 and 654.24 is: 907.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    677.55 : 939.81 = 654.24 : x
  2. Step 2: Convert to fraction form
    677.55/939.81 = 654.24/x
  3. Step 3: Cross multiply
    677.55x = 939.81 × 654.24
  4. Step 4: Simplify right side
    677.55x = 614,861.29
  5. Step 5: Solve for x
    x = 614,861.29/677.55
  6. Step 6: Final answer
    x = 907.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.