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Finding the Fourth Proportional to 345,324.60, 517,986.90 and 145,870.20

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Solution

The fourth proportional to 345,324.60, 517,986.90 and 145,870.20 is: 218,805.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,324.60 : 517,986.90 = 145,870.20 : x
  2. Step 2: Convert to fraction form
    345,324.60/517,986.90 = 145,870.20/x
  3. Step 3: Cross multiply
    345,324.60x = 517,986.90 × 145,870.20
  4. Step 4: Simplify right side
    345,324.60x = 75,558,852,700.38
  5. Step 5: Solve for x
    x = 75,558,852,700.38/345,324.60
  6. Step 6: Final answer
    x = 218,805.30

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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.