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Finding the Fourth Proportional to 486,139.60, 729,428.10 and 170,822.80

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Solution

The fourth proportional to 486,139.60, 729,428.10 and 170,822.80 is: 256,311.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,139.60 : 729,428.10 = 170,822.80 : x
  2. Step 2: Convert to fraction form
    486,139.60/729,428.10 = 170,822.80/x
  3. Step 3: Cross multiply
    486,139.60x = 729,428.10 × 170,822.80
  4. Step 4: Simplify right side
    486,139.60x = 124,602,950,440.68
  5. Step 5: Solve for x
    x = 124,602,950,440.68/486,139.60
  6. Step 6: Final answer
    x = 256,311.05

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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.