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Finding the Fourth Proportional to 453,312.20, 679,968.30 and 137,728.10

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Solution

The fourth proportional to 453,312.20, 679,968.30 and 137,728.10 is: 206,592.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,312.20 : 679,968.30 = 137,728.10 : x
  2. Step 2: Convert to fraction form
    453,312.20/679,968.30 = 137,728.10/x
  3. Step 3: Cross multiply
    453,312.20x = 679,968.30 × 137,728.10
  4. Step 4: Simplify right side
    453,312.20x = 93,650,742,019.23
  5. Step 5: Solve for x
    x = 93,650,742,019.23/453,312.20
  6. Step 6: Final answer
    x = 206,592.15

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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.