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Finding the Fourth Proportional to 402,691.68, 555,718.20 and 221,404.77

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Solution

The fourth proportional to 402,691.68, 555,718.20 and 221,404.77 is: 305,540.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,691.68 : 555,718.20 = 221,404.77 : x
  2. Step 2: Convert to fraction form
    402,691.68/555,718.20 = 221,404.77/x
  3. Step 3: Cross multiply
    402,691.68x = 555,718.20 × 221,404.77
  4. Step 4: Simplify right side
    402,691.68x = 123,038,660,255.81
  5. Step 5: Solve for x
    x = 123,038,660,255.81/402,691.68
  6. Step 6: Final answer
    x = 305,540.61

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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.