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Finding the Fourth Proportional to 439,730.64, 606,843.18 and 258,439.95

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Solution

The fourth proportional to 439,730.64, 606,843.18 and 258,439.95 is: 356,655.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,730.64 : 606,843.18 = 258,439.95 : x
  2. Step 2: Convert to fraction form
    439,730.64/606,843.18 = 258,439.95/x
  3. Step 3: Cross multiply
    439,730.64x = 606,843.18 × 258,439.95
  4. Step 4: Simplify right side
    439,730.64x = 156,832,521,097.04
  5. Step 5: Solve for x
    x = 156,832,521,097.04/439,730.64
  6. Step 6: Final answer
    x = 356,655.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.