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Finding the Fourth Proportional to 929.02, 1,395.15 and 724.09

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Solution

The fourth proportional to 929.02, 1,395.15 and 724.09 is: 1,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.02 : 1,395.15 = 724.09 : x
  2. Step 2: Convert to fraction form
    929.02/1,395.15 = 724.09/x
  3. Step 3: Cross multiply
    929.02x = 1,395.15 × 724.09
  4. Step 4: Simplify right side
    929.02x = 1,010,214.16
  5. Step 5: Solve for x
    x = 1,010,214.16/929.02
  6. Step 6: Final answer
    x = 1,087.40

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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.