Home / 428,772.04-643,255.26-148,291.72

Finding the Fourth Proportional to 428,772.04, 643,255.26 and 148,291.72

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Solution

The fourth proportional to 428,772.04, 643,255.26 and 148,291.72 is: 222,471.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,772.04 : 643,255.26 = 148,291.72 : x
  2. Step 2: Convert to fraction form
    428,772.04/643,255.26 = 148,291.72/x
  3. Step 3: Cross multiply
    428,772.04x = 643,255.26 × 148,291.72
  4. Step 4: Simplify right side
    428,772.04x = 95,389,428,904.45
  5. Step 5: Solve for x
    x = 95,389,428,904.45/428,772.04
  6. Step 6: Final answer
    x = 222,471.20

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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.