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Finding the Fourth Proportional to 381,542.79, 526,421.09 and 245,655.37

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Solution

The fourth proportional to 381,542.79, 526,421.09 and 245,655.37 is: 338,934.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,542.79 : 526,421.09 = 245,655.37 : x
  2. Step 2: Convert to fraction form
    381,542.79/526,421.09 = 245,655.37/x
  3. Step 3: Cross multiply
    381,542.79x = 526,421.09 × 245,655.37
  4. Step 4: Simplify right side
    381,542.79x = 129,318,167,639.75
  5. Step 5: Solve for x
    x = 129,318,167,639.75/381,542.79
  6. Step 6: Final answer
    x = 338,934.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.