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Finding the Fourth Proportional to 424,000.20, 636,000.30 and 397,756.20

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Solution

The fourth proportional to 424,000.20, 636,000.30 and 397,756.20 is: 596,634.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,000.20 : 636,000.30 = 397,756.20 : x
  2. Step 2: Convert to fraction form
    424,000.20/636,000.30 = 397,756.20/x
  3. Step 3: Cross multiply
    424,000.20x = 636,000.30 × 397,756.20
  4. Step 4: Simplify right side
    424,000.20x = 252,973,062,526.86
  5. Step 5: Solve for x
    x = 252,973,062,526.86/424,000.20
  6. Step 6: Final answer
    x = 596,634.30

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Double scale
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Similar ratio
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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.