Home / 428,920.60-643,536.90-148,466.20

Finding the Fourth Proportional to 428,920.60, 643,536.90 and 148,466.20

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Solution

The fourth proportional to 428,920.60, 643,536.90 and 148,466.20 is: 222,753.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,920.60 : 643,536.90 = 148,466.20 : x
  2. Step 2: Convert to fraction form
    428,920.60/643,536.90 = 148,466.20/x
  3. Step 3: Cross multiply
    428,920.60x = 643,536.90 × 148,466.20
  4. Step 4: Simplify right side
    428,920.60x = 95,543,478,102.78
  5. Step 5: Solve for x
    x = 95,543,478,102.78/428,920.60
  6. Step 6: Final answer
    x = 222,753.30

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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.