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Finding the Fourth Proportional to 443,430.48, 665,244.20 and 127,862.80

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Solution

The fourth proportional to 443,430.48, 665,244.20 and 127,862.80 is: 191,822.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,430.48 : 665,244.20 = 127,862.80 : x
  2. Step 2: Convert to fraction form
    443,430.48/665,244.20 = 127,862.80/x
  3. Step 3: Cross multiply
    443,430.48x = 665,244.20 × 127,862.80
  4. Step 4: Simplify right side
    443,430.48x = 85,059,986,095.76
  5. Step 5: Solve for x
    x = 85,059,986,095.76/443,430.48
  6. Step 6: Final answer
    x = 191,822.60

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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.