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Finding the Fourth Proportional to 255,079.05, 382,618.58 and 215,713.05

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Solution

The fourth proportional to 255,079.05, 382,618.58 and 215,713.05 is: 323,569.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,079.05 : 382,618.58 = 215,713.05 : x
  2. Step 2: Convert to fraction form
    255,079.05/382,618.58 = 215,713.05/x
  3. Step 3: Cross multiply
    255,079.05x = 382,618.58 × 215,713.05
  4. Step 4: Simplify right side
    255,079.05x = 82,535,819,799.90
  5. Step 5: Solve for x
    x = 82,535,819,799.90/255,079.05
  6. Step 6: Final answer
    x = 323,569.58

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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.