Home / 428,839.17-642,446.85-286,254.54

Finding the Fourth Proportional to 428,839.17, 642,446.85 and 286,254.54

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Solution

The fourth proportional to 428,839.17, 642,446.85 and 286,254.54 is: 428,839.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,839.17 : 642,446.85 = 286,254.54 : x
  2. Step 2: Convert to fraction form
    428,839.17/642,446.85 = 286,254.54/x
  3. Step 3: Cross multiply
    428,839.17x = 642,446.85 × 286,254.54
  4. Step 4: Simplify right side
    428,839.17x = 183,903,327,521.20
  5. Step 5: Solve for x
    x = 183,903,327,521.20/428,839.17
  6. Step 6: Final answer
    x = 428,839.86

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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.