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Finding the Fourth Proportional to 356,421.60, 534,373.20 and 145,951.20

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Solution

The fourth proportional to 356,421.60, 534,373.20 and 145,951.20 is: 218,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,421.60 : 534,373.20 = 145,951.20 : x
  2. Step 2: Convert to fraction form
    356,421.60/534,373.20 = 145,951.20/x
  3. Step 3: Cross multiply
    356,421.60x = 534,373.20 × 145,951.20
  4. Step 4: Simplify right side
    356,421.60x = 77,992,409,787.84
  5. Step 5: Solve for x
    x = 77,992,409,787.84/356,421.60
  6. Step 6: Final answer
    x = 218,820.66

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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.