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Finding the Fourth Proportional to 423,391.28, 635,081.42 and 103,545.93

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Solution

The fourth proportional to 423,391.28, 635,081.42 and 103,545.93 is: 155,317.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,391.28 : 635,081.42 = 103,545.93 : x
  2. Step 2: Convert to fraction form
    423,391.28/635,081.42 = 103,545.93/x
  3. Step 3: Cross multiply
    423,391.28x = 635,081.42 × 103,545.93
  4. Step 4: Simplify right side
    423,391.28x = 65,760,095,313.15
  5. Step 5: Solve for x
    x = 65,760,095,313.15/423,391.28
  6. Step 6: Final answer
    x = 155,317.55

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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.