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Finding the Fourth Proportional to 245,191.20, 338,240.46 and 212,881.87

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Solution

The fourth proportional to 245,191.20, 338,240.46 and 212,881.87 is: 293,669.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,191.20 : 338,240.46 = 212,881.87 : x
  2. Step 2: Convert to fraction form
    245,191.20/338,240.46 = 212,881.87/x
  3. Step 3: Cross multiply
    245,191.20x = 338,240.46 × 212,881.87
  4. Step 4: Simplify right side
    245,191.20x = 72,005,261,658.11
  5. Step 5: Solve for x
    x = 72,005,261,658.11/245,191.20
  6. Step 6: Final answer
    x = 293,669.84

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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.