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Finding the Fourth Proportional to 555,339.60, 765,978.84 and 340,565.22

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Solution

The fourth proportional to 555,339.60, 765,978.84 and 340,565.22 is: 469,740.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,339.60 : 765,978.84 = 340,565.22 : x
  2. Step 2: Convert to fraction form
    555,339.60/765,978.84 = 340,565.22/x
  3. Step 3: Cross multiply
    555,339.60x = 765,978.84 × 340,565.22
  4. Step 4: Simplify right side
    555,339.60x = 260,865,752,159.95
  5. Step 5: Solve for x
    x = 260,865,752,159.95/555,339.60
  6. Step 6: Final answer
    x = 469,740.95

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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.