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Finding the Fourth Proportional to 508,973.15, 763,459.22 and 129,893.90

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Solution

The fourth proportional to 508,973.15, 763,459.22 and 129,893.90 is: 194,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,973.15 : 763,459.22 = 129,893.90 : x
  2. Step 2: Convert to fraction form
    508,973.15/763,459.22 = 129,893.90/x
  3. Step 3: Cross multiply
    508,973.15x = 763,459.22 × 129,893.90
  4. Step 4: Simplify right side
    508,973.15x = 99,168,692,084.20
  5. Step 5: Solve for x
    x = 99,168,692,084.20/508,973.15
  6. Step 6: Final answer
    x = 194,840.71

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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.