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Finding the Fourth Proportional to 443,575.40, 665,427.32 and 139,866.47

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Solution

The fourth proportional to 443,575.40, 665,427.32 and 139,866.47 is: 209,819.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,575.40 : 665,427.32 = 139,866.47 : x
  2. Step 2: Convert to fraction form
    443,575.40/665,427.32 = 139,866.47/x
  3. Step 3: Cross multiply
    443,575.40x = 665,427.32 × 139,866.47
  4. Step 4: Simplify right side
    443,575.40x = 93,070,966,263.49
  5. Step 5: Solve for x
    x = 93,070,966,263.49/443,575.40
  6. Step 6: Final answer
    x = 209,819.95

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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.