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Finding the Fourth Proportional to 343,364.55, 515,538.90 and 259,711.80

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Solution

The fourth proportional to 343,364.55, 515,538.90 and 259,711.80 is: 389,939.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,364.55 : 515,538.90 = 259,711.80 : x
  2. Step 2: Convert to fraction form
    343,364.55/515,538.90 = 259,711.80/x
  3. Step 3: Cross multiply
    343,364.55x = 515,538.90 × 259,711.80
  4. Step 4: Simplify right side
    343,364.55x = 133,891,535,689.02
  5. Step 5: Solve for x
    x = 133,891,535,689.02/343,364.55
  6. Step 6: Final answer
    x = 389,939.89

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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.