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Finding the Fourth Proportional to 453,312.45, 679,968.68 and 137,728.35

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Solution

The fourth proportional to 453,312.45, 679,968.68 and 137,728.35 is: 206,592.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,312.45 : 679,968.68 = 137,728.35 : x
  2. Step 2: Convert to fraction form
    453,312.45/679,968.68 = 137,728.35/x
  3. Step 3: Cross multiply
    453,312.45x = 679,968.68 × 137,728.35
  4. Step 4: Simplify right side
    453,312.45x = 93,650,963,659.44
  5. Step 5: Solve for x
    x = 93,650,963,659.44/453,312.45
  6. Step 6: Final answer
    x = 206,592.53

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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.