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Finding the Fourth Proportional to 350,502.40, 525,638.40 and 128,857.60

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Solution

The fourth proportional to 350,502.40, 525,638.40 and 128,857.60 is: 193,244.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    350,502.40 : 525,638.40 = 128,857.60 : x
  2. Step 2: Convert to fraction form
    350,502.40/525,638.40 = 128,857.60/x
  3. Step 3: Cross multiply
    350,502.40x = 525,638.40 × 128,857.60
  4. Step 4: Simplify right side
    350,502.40x = 67,732,502,691.84
  5. Step 5: Solve for x
    x = 67,732,502,691.84/350,502.40
  6. Step 6: Final answer
    x = 193,244.05

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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.