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Finding the Fourth Proportional to 689,282.42, 951,146.98 and 398,843.78

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Solution

The fourth proportional to 689,282.42, 951,146.98 and 398,843.78 is: 550,368.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,282.42 : 951,146.98 = 398,843.78 : x
  2. Step 2: Convert to fraction form
    689,282.42/951,146.98 = 398,843.78/x
  3. Step 3: Cross multiply
    689,282.42x = 951,146.98 × 398,843.78
  4. Step 4: Simplify right side
    689,282.42x = 379,359,051,085.94
  5. Step 5: Solve for x
    x = 379,359,051,085.94/689,282.42
  6. Step 6: Final answer
    x = 550,368.10

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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.