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Finding the Fourth Proportional to 390,513.39, 585,545.88 and 153,726.90

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Solution

The fourth proportional to 390,513.39, 585,545.88 and 153,726.90 is: 230,502.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,513.39 : 585,545.88 = 153,726.90 : x
  2. Step 2: Convert to fraction form
    390,513.39/585,545.88 = 153,726.90/x
  3. Step 3: Cross multiply
    390,513.39x = 585,545.88 × 153,726.90
  4. Step 4: Simplify right side
    390,513.39x = 90,014,152,940.17
  5. Step 5: Solve for x
    x = 90,014,152,940.17/390,513.39
  6. Step 6: Final answer
    x = 230,502.09

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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.