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Finding the Fourth Proportional to 245,561.55, 338,411.84 and 215,148.75

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Solution

The fourth proportional to 245,561.55, 338,411.84 and 215,148.75 is: 296,499.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,561.55 : 338,411.84 = 215,148.75 : x
  2. Step 2: Convert to fraction form
    245,561.55/338,411.84 = 215,148.75/x
  3. Step 3: Cross multiply
    245,561.55x = 338,411.84 × 215,148.75
  4. Step 4: Simplify right side
    245,561.55x = 72,808,883,285.46
  5. Step 5: Solve for x
    x = 72,808,883,285.46/245,561.55
  6. Step 6: Final answer
    x = 296,499.53

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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.