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Finding the Fourth Proportional to 295,397.20, 442,439.70 and 256,031.20

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Solution

The fourth proportional to 295,397.20, 442,439.70 and 256,031.20 is: 383,478.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,397.20 : 442,439.70 = 256,031.20 : x
  2. Step 2: Convert to fraction form
    295,397.20/442,439.70 = 256,031.20/x
  3. Step 3: Cross multiply
    295,397.20x = 442,439.70 × 256,031.20
  4. Step 4: Simplify right side
    295,397.20x = 113,278,367,318.64
  5. Step 5: Solve for x
    x = 113,278,367,318.64/295,397.20
  6. Step 6: Final answer
    x = 383,478.13

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1.5x scale

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.