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Finding the Fourth Proportional to 423,901.35, 636,344.10 and 255,611.70

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Solution

The fourth proportional to 423,901.35, 636,344.10 and 255,611.70 is: 383,714.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,901.35 : 636,344.10 = 255,611.70 : x
  2. Step 2: Convert to fraction form
    423,901.35/636,344.10 = 255,611.70/x
  3. Step 3: Cross multiply
    423,901.35x = 636,344.10 × 255,611.70
  4. Step 4: Simplify right side
    423,901.35x = 162,656,997,185.97
  5. Step 5: Solve for x
    x = 162,656,997,185.97/423,901.35
  6. Step 6: Final answer
    x = 383,714.27

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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.