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Finding the Fourth Proportional to 347,581.71, 521,455.80 and 145,065.21

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Solution

The fourth proportional to 347,581.71, 521,455.80 and 145,065.21 is: 217,632.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,581.71 : 521,455.80 = 145,065.21 : x
  2. Step 2: Convert to fraction form
    347,581.71/521,455.80 = 145,065.21/x
  3. Step 3: Cross multiply
    347,581.71x = 521,455.80 × 145,065.21
  4. Step 4: Simplify right side
    347,581.71x = 75,645,095,132.72
  5. Step 5: Solve for x
    x = 75,645,095,132.72/347,581.71
  6. Step 6: Final answer
    x = 217,632.55

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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.