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Finding the Fourth Proportional to 443,520.59, 665,041.19 and 139,857.46

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Solution

The fourth proportional to 443,520.59, 665,041.19 and 139,857.46 is: 209,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,520.59 : 665,041.19 = 139,857.46 : x
  2. Step 2: Convert to fraction form
    443,520.59/665,041.19 = 139,857.46/x
  3. Step 3: Cross multiply
    443,520.59x = 665,041.19 × 139,857.46
  4. Step 4: Simplify right side
    443,520.59x = 93,010,969,266.89
  5. Step 5: Solve for x
    x = 93,010,969,266.89/443,520.59
  6. Step 6: Final answer
    x = 209,710.60

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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.