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Finding the Fourth Proportional to 636,817.20, 955,225.80 and 424,240.80

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Solution

The fourth proportional to 636,817.20, 955,225.80 and 424,240.80 is: 636,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,817.20 : 955,225.80 = 424,240.80 : x
  2. Step 2: Convert to fraction form
    636,817.20/955,225.80 = 424,240.80/x
  3. Step 3: Cross multiply
    636,817.20x = 955,225.80 × 424,240.80
  4. Step 4: Simplify right side
    636,817.20x = 405,245,757,572.64
  5. Step 5: Solve for x
    x = 405,245,757,572.64/636,817.20
  6. Step 6: Final answer
    x = 636,361.20

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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.