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Finding the Fourth Proportional to 443,403.60, 665,203.68 and 127,835.88

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Solution

The fourth proportional to 443,403.60, 665,203.68 and 127,835.88 is: 191,782.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,403.60 : 665,203.68 = 127,835.88 : x
  2. Step 2: Convert to fraction form
    443,403.60/665,203.68 = 127,835.88/x
  3. Step 3: Cross multiply
    443,403.60x = 665,203.68 × 127,835.88
  4. Step 4: Simplify right side
    443,403.60x = 85,036,897,812.04
  5. Step 5: Solve for x
    x = 85,036,897,812.04/443,403.60
  6. Step 6: Final answer
    x = 191,782.15

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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.