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Finding the Fourth Proportional to 498,889.80, 748,334.70 and 143,915.40

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Solution

The fourth proportional to 498,889.80, 748,334.70 and 143,915.40 is: 215,873.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,889.80 : 748,334.70 = 143,915.40 : x
  2. Step 2: Convert to fraction form
    498,889.80/748,334.70 = 143,915.40/x
  3. Step 3: Cross multiply
    498,889.80x = 748,334.70 × 143,915.40
  4. Step 4: Simplify right side
    498,889.80x = 107,696,887,684.38
  5. Step 5: Solve for x
    x = 107,696,887,684.38/498,889.80
  6. Step 6: Final answer
    x = 215,873.10

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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.