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Finding the Fourth Proportional to 1,000.69, 1,501.57 and 487.69

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Solution

The fourth proportional to 1,000.69, 1,501.57 and 487.69 is: 731.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.69 : 1,501.57 = 487.69 : x
  2. Step 2: Convert to fraction form
    1,000.69/1,501.57 = 487.69/x
  3. Step 3: Cross multiply
    1,000.69x = 1,501.57 × 487.69
  4. Step 4: Simplify right side
    1,000.69x = 732,297.53
  5. Step 5: Solve for x
    x = 732,297.53/1,000.69
  6. Step 6: Final answer
    x = 731.79

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Double scale
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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.