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Finding the Fourth Proportional to 394,618.32, 591,868.92 and 145,242

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Solution

The fourth proportional to 394,618.32, 591,868.92 and 145,242 is: 217,841.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,618.32 : 591,868.92 = 145,242 : x
  2. Step 2: Convert to fraction form
    394,618.32/591,868.92 = 145,242/x
  3. Step 3: Cross multiply
    394,618.32x = 591,868.92 × 145,242
  4. Step 4: Simplify right side
    394,618.32x = 85,964,225,678.64
  5. Step 5: Solve for x
    x = 85,964,225,678.64/394,618.32
  6. Step 6: Final answer
    x = 217,841.45

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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.