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Finding the Fourth Proportional to 442,928.60, 664,392.90 and 255,721.40

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Solution

The fourth proportional to 442,928.60, 664,392.90 and 255,721.40 is: 383,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,928.60 : 664,392.90 = 255,721.40 : x
  2. Step 2: Convert to fraction form
    442,928.60/664,392.90 = 255,721.40/x
  3. Step 3: Cross multiply
    442,928.60x = 664,392.90 × 255,721.40
  4. Step 4: Simplify right side
    442,928.60x = 169,899,482,538.06
  5. Step 5: Solve for x
    x = 169,899,482,538.06/442,928.60
  6. Step 6: Final answer
    x = 383,582.10

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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.