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Finding the Fourth Proportional to 428,023.93, 642,085.11 and 250,532.47

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Solution

The fourth proportional to 428,023.93, 642,085.11 and 250,532.47 is: 375,827.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,023.93 : 642,085.11 = 250,532.47 : x
  2. Step 2: Convert to fraction form
    428,023.93/642,085.11 = 250,532.47/x
  3. Step 3: Cross multiply
    428,023.93x = 642,085.11 × 250,532.47
  4. Step 4: Simplify right side
    428,023.93x = 160,863,168,558.52
  5. Step 5: Solve for x
    x = 160,863,168,558.52/428,023.93
  6. Step 6: Final answer
    x = 375,827.51

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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.