Home / 458,989.20-688,484.34-143,447.76

Finding the Fourth Proportional to 458,989.20, 688,484.34 and 143,447.76

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Solution

The fourth proportional to 458,989.20, 688,484.34 and 143,447.76 is: 215,171.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,989.20 : 688,484.34 = 143,447.76 : x
  2. Step 2: Convert to fraction form
    458,989.20/688,484.34 = 143,447.76/x
  3. Step 3: Cross multiply
    458,989.20x = 688,484.34 × 143,447.76
  4. Step 4: Simplify right side
    458,989.20x = 98,761,536,368.08
  5. Step 5: Solve for x
    x = 98,761,536,368.08/458,989.20
  6. Step 6: Final answer
    x = 215,171.81

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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.