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Finding the Fourth Proportional to 1,545.90, 2,318.04 and 929.90

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Solution

The fourth proportional to 1,545.90, 2,318.04 and 929.90 is: 1,394.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.90 : 2,318.04 = 929.90 : x
  2. Step 2: Convert to fraction form
    1,545.90/2,318.04 = 929.90/x
  3. Step 3: Cross multiply
    1,545.90x = 2,318.04 × 929.90
  4. Step 4: Simplify right side
    1,545.90x = 2,155,533.81
  5. Step 5: Solve for x
    x = 2,155,533.81/1,545.90
  6. Step 6: Final answer
    x = 1,394.36

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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.