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Finding the Fourth Proportional to 345,219.40, 518,029.98 and 145,527.40

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Solution

The fourth proportional to 345,219.40, 518,029.98 and 145,527.40 is: 218,375.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,219.40 : 518,029.98 = 145,527.40 : x
  2. Step 2: Convert to fraction form
    345,219.40/518,029.98 = 145,527.40/x
  3. Step 3: Cross multiply
    345,219.40x = 518,029.98 × 145,527.40
  4. Step 4: Simplify right side
    345,219.40x = 75,387,556,111.45
  5. Step 5: Solve for x
    x = 75,387,556,111.45/345,219.40
  6. Step 6: Final answer
    x = 218,375.78

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1.5x scale

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.