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Finding the Fourth Proportional to 981.69, 1,354.76 and 539.62

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Solution

The fourth proportional to 981.69, 1,354.76 and 539.62 is: 744.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    981.69 : 1,354.76 = 539.62 : x
  2. Step 2: Convert to fraction form
    981.69/1,354.76 = 539.62/x
  3. Step 3: Cross multiply
    981.69x = 1,354.76 × 539.62
  4. Step 4: Simplify right side
    981.69x = 731,055.93
  5. Step 5: Solve for x
    x = 731,055.93/981.69
  6. Step 6: Final answer
    x = 744.69

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.