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Finding the Fourth Proportional to 288,679.80, 398,365.58 and 157,855.05

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Solution

The fourth proportional to 288,679.80, 398,365.58 and 157,855.05 is: 217,833.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,679.80 : 398,365.58 = 157,855.05 : x
  2. Step 2: Convert to fraction form
    288,679.80/398,365.58 = 157,855.05/x
  3. Step 3: Cross multiply
    288,679.80x = 398,365.58 × 157,855.05
  4. Step 4: Simplify right side
    288,679.80x = 62,884,017,759.90
  5. Step 5: Solve for x
    x = 62,884,017,759.90/288,679.80
  6. Step 6: Final answer
    x = 217,833.11

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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.