Home / 428,334.16-642,446.76-112,815.76

Finding the Fourth Proportional to 428,334.16, 642,446.76 and 112,815.76

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Solution

The fourth proportional to 428,334.16, 642,446.76 and 112,815.76 is: 169,209.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,334.16 : 642,446.76 = 112,815.76 : x
  2. Step 2: Convert to fraction form
    428,334.16/642,446.76 = 112,815.76/x
  3. Step 3: Cross multiply
    428,334.16x = 642,446.76 × 112,815.76
  4. Step 4: Simplify right side
    428,334.16x = 72,478,119,488.94
  5. Step 5: Solve for x
    x = 72,478,119,488.94/428,334.16
  6. Step 6: Final answer
    x = 169,209.29

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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.