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Finding the Fourth Proportional to 347,712.40, 521,147.40 and 147,612.70

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Solution

The fourth proportional to 347,712.40, 521,147.40 and 147,612.70 is: 221,240.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,712.40 : 521,147.40 = 147,612.70 : x
  2. Step 2: Convert to fraction form
    347,712.40/521,147.40 = 147,612.70/x
  3. Step 3: Cross multiply
    347,712.40x = 521,147.40 × 147,612.70
  4. Step 4: Simplify right side
    347,712.40x = 76,927,974,811.98
  5. Step 5: Solve for x
    x = 76,927,974,811.98/347,712.40
  6. Step 6: Final answer
    x = 221,240.24

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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.