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Finding the Fourth Proportional to 395,294.40, 592,999.11 and 128,989.35

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Solution

The fourth proportional to 395,294.40, 592,999.11 and 128,989.35 is: 193,502.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,294.40 : 592,999.11 = 128,989.35 : x
  2. Step 2: Convert to fraction form
    395,294.40/592,999.11 = 128,989.35/x
  3. Step 3: Cross multiply
    395,294.40x = 592,999.11 × 128,989.35
  4. Step 4: Simplify right side
    395,294.40x = 76,490,569,749.48
  5. Step 5: Solve for x
    x = 76,490,569,749.48/395,294.40
  6. Step 6: Final answer
    x = 193,502.79

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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.