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Finding the Fourth Proportional to 390,490.48, 585,932.88 and 177,122.40

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Solution

The fourth proportional to 390,490.48, 585,932.88 and 177,122.40 is: 265,773.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,490.48 : 585,932.88 = 177,122.40 : x
  2. Step 2: Convert to fraction form
    390,490.48/585,932.88 = 177,122.40/x
  3. Step 3: Cross multiply
    390,490.48x = 585,932.88 × 177,122.40
  4. Step 4: Simplify right side
    390,490.48x = 103,781,838,745.14
  5. Step 5: Solve for x
    x = 103,781,838,745.14/390,490.48
  6. Step 6: Final answer
    x = 265,773.03

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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.