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Finding the Fourth Proportional to 642,630.60, 963,945.90 and 618,136.20

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Solution

The fourth proportional to 642,630.60, 963,945.90 and 618,136.20 is: 927,204.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,630.60 : 963,945.90 = 618,136.20 : x
  2. Step 2: Convert to fraction form
    642,630.60/963,945.90 = 618,136.20/x
  3. Step 3: Cross multiply
    642,630.60x = 963,945.90 × 618,136.20
  4. Step 4: Simplify right side
    642,630.60x = 595,849,855,631.58
  5. Step 5: Solve for x
    x = 595,849,855,631.58/642,630.60
  6. Step 6: Final answer
    x = 927,204.30

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Double scale
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Similar ratio
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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.