Home / 428,763.78-643,151.10-162,452.76

Finding the Fourth Proportional to 428,763.78, 643,151.10 and 162,452.76

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Solution

The fourth proportional to 428,763.78, 643,151.10 and 162,452.76 is: 243,681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,763.78 : 643,151.10 = 162,452.76 : x
  2. Step 2: Convert to fraction form
    428,763.78/643,151.10 = 162,452.76/x
  3. Step 3: Cross multiply
    428,763.78x = 643,151.10 × 162,452.76
  4. Step 4: Simplify right side
    428,763.78x = 104,481,671,292.04
  5. Step 5: Solve for x
    x = 104,481,671,292.04/428,763.78
  6. Step 6: Final answer
    x = 243,681.20

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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.