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Finding the Fourth Proportional to 458,671.20, 688,006.80 and 121,711.20

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Solution

The fourth proportional to 458,671.20, 688,006.80 and 121,711.20 is: 182,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,671.20 : 688,006.80 = 121,711.20 : x
  2. Step 2: Convert to fraction form
    458,671.20/688,006.80 = 121,711.20/x
  3. Step 3: Cross multiply
    458,671.20x = 688,006.80 × 121,711.20
  4. Step 4: Simplify right side
    458,671.20x = 83,738,133,236.16
  5. Step 5: Solve for x
    x = 83,738,133,236.16/458,671.20
  6. Step 6: Final answer
    x = 182,566.80

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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.