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Finding the Fourth Proportional to 423,580, 635,235.27 and 139,204.93

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Solution

The fourth proportional to 423,580, 635,235.27 and 139,204.93 is: 208,763.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,580 : 635,235.27 = 139,204.93 : x
  2. Step 2: Convert to fraction form
    423,580/635,235.27 = 139,204.93/x
  3. Step 3: Cross multiply
    423,580x = 635,235.27 × 139,204.93
  4. Step 4: Simplify right side
    423,580x = 88,427,881,293.88
  5. Step 5: Solve for x
    x = 88,427,881,293.88/423,580
  6. Step 6: Final answer
    x = 208,763.12

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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.