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Finding the Fourth Proportional to 402,718.76, 555,754.02 and 221,442.40

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Solution

The fourth proportional to 402,718.76, 555,754.02 and 221,442.40 is: 305,591.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,718.76 : 555,754.02 = 221,442.40 : x
  2. Step 2: Convert to fraction form
    402,718.76/555,754.02 = 221,442.40/x
  3. Step 3: Cross multiply
    402,718.76x = 555,754.02 × 221,442.40
  4. Step 4: Simplify right side
    402,718.76x = 123,067,503,998.45
  5. Step 5: Solve for x
    x = 123,067,503,998.45/402,718.76
  6. Step 6: Final answer
    x = 305,591.68

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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.