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Finding the Fourth Proportional to 423,612.48, 635,284.10 and 139,237.40

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Solution

The fourth proportional to 423,612.48, 635,284.10 and 139,237.40 is: 208,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,612.48 : 635,284.10 = 139,237.40 : x
  2. Step 2: Convert to fraction form
    423,612.48/635,284.10 = 139,237.40/x
  3. Step 3: Cross multiply
    423,612.48x = 635,284.10 × 139,237.40
  4. Step 4: Simplify right side
    423,612.48x = 88,455,306,345.34
  5. Step 5: Solve for x
    x = 88,455,306,345.34/423,612.48
  6. Step 6: Final answer
    x = 208,811.85

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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.