Home / 429,915.12-645,131.88-149,629.20

Finding the Fourth Proportional to 429,915.12, 645,131.88 and 149,629.20

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Solution

The fourth proportional to 429,915.12, 645,131.88 and 149,629.20 is: 224,534.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,915.12 : 645,131.88 = 149,629.20 : x
  2. Step 2: Convert to fraction form
    429,915.12/645,131.88 = 149,629.20/x
  3. Step 3: Cross multiply
    429,915.12x = 645,131.88 × 149,629.20
  4. Step 4: Simplify right side
    429,915.12x = 96,530,567,098.90
  5. Step 5: Solve for x
    x = 96,530,567,098.90/429,915.12
  6. Step 6: Final answer
    x = 224,534.01

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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.