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Finding the Fourth Proportional to 636,815.70, 955,223.55 and 424,239.30

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Solution

The fourth proportional to 636,815.70, 955,223.55 and 424,239.30 is: 636,358.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,815.70 : 955,223.55 = 424,239.30 : x
  2. Step 2: Convert to fraction form
    636,815.70/955,223.55 = 424,239.30/x
  3. Step 3: Cross multiply
    636,815.70x = 955,223.55 × 424,239.30
  4. Step 4: Simplify right side
    636,815.70x = 405,243,370,195.52
  5. Step 5: Solve for x
    x = 405,243,370,195.52/636,815.70
  6. Step 6: Final answer
    x = 636,358.95

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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.