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Finding the Fourth Proportional to 423,610.47, 635,281.11 and 139,235.40

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Solution

The fourth proportional to 423,610.47, 635,281.11 and 139,235.40 is: 208,808.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,610.47 : 635,281.11 = 139,235.40 : x
  2. Step 2: Convert to fraction form
    423,610.47/635,281.11 = 139,235.40/x
  3. Step 3: Cross multiply
    423,610.47x = 635,281.11 × 139,235.40
  4. Step 4: Simplify right side
    423,610.47x = 88,453,619,463.29
  5. Step 5: Solve for x
    x = 88,453,619,463.29/423,610.47
  6. Step 6: Final answer
    x = 208,808.86

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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.