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Finding the Fourth Proportional to 402,687.06, 555,679.53 and 221,394.30

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Solution

The fourth proportional to 402,687.06, 555,679.53 and 221,394.30 is: 305,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,687.06 : 555,679.53 = 221,394.30 : x
  2. Step 2: Convert to fraction form
    402,687.06/555,679.53 = 221,394.30/x
  3. Step 3: Cross multiply
    402,687.06x = 555,679.53 × 221,394.30
  4. Step 4: Simplify right side
    402,687.06x = 123,024,280,568.68
  5. Step 5: Solve for x
    x = 123,024,280,568.68/402,687.06
  6. Step 6: Final answer
    x = 305,508.40

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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.