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Finding the Fourth Proportional to 426,558.18, 639,345.16 and 160,148.78

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Solution

The fourth proportional to 426,558.18, 639,345.16 and 160,148.78 is: 240,038.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,558.18 : 639,345.16 = 160,148.78 : x
  2. Step 2: Convert to fraction form
    426,558.18/639,345.16 = 160,148.78/x
  3. Step 3: Cross multiply
    426,558.18x = 639,345.16 × 160,148.78
  4. Step 4: Simplify right side
    426,558.18x = 102,390,347,372.91
  5. Step 5: Solve for x
    x = 102,390,347,372.91/426,558.18
  6. Step 6: Final answer
    x = 240,038.41

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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.