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Finding the Fourth Proportional to 390,784.74, 585,870.88 and 154,304.43

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Solution

The fourth proportional to 390,784.74, 585,870.88 and 154,304.43 is: 231,335.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,784.74 : 585,870.88 = 154,304.43 : x
  2. Step 2: Convert to fraction form
    390,784.74/585,870.88 = 154,304.43/x
  3. Step 3: Cross multiply
    390,784.74x = 585,870.88 × 154,304.43
  4. Step 4: Simplify right side
    390,784.74x = 90,402,469,262.64
  5. Step 5: Solve for x
    x = 90,402,469,262.64/390,784.74
  6. Step 6: Final answer
    x = 231,335.72

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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.