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Finding the Fourth Proportional to 347,417.56, 521,375.55 and 147,878.11

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Solution

The fourth proportional to 347,417.56, 521,375.55 and 147,878.11 is: 221,923.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,417.56 : 521,375.55 = 147,878.11 : x
  2. Step 2: Convert to fraction form
    347,417.56/521,375.55 = 147,878.11/x
  3. Step 3: Cross multiply
    347,417.56x = 521,375.55 × 147,878.11
  4. Step 4: Simplify right side
    347,417.56x = 77,100,030,934.21
  5. Step 5: Solve for x
    x = 77,100,030,934.21/347,417.56
  6. Step 6: Final answer
    x = 221,923.24

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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.