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Finding the Fourth Proportional to 1,070.74, 1,605.54 and 507.28

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Solution

The fourth proportional to 1,070.74, 1,605.54 and 507.28 is: 760.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.74 : 1,605.54 = 507.28 : x
  2. Step 2: Convert to fraction form
    1,070.74/1,605.54 = 507.28/x
  3. Step 3: Cross multiply
    1,070.74x = 1,605.54 × 507.28
  4. Step 4: Simplify right side
    1,070.74x = 814,456.38
  5. Step 5: Solve for x
    x = 814,456.38/1,070.74
  6. Step 6: Final answer
    x = 760.65

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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.