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Finding the Fourth Proportional to 828,885.58, 1,143,863.85 and 489,375.70

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Solution

The fourth proportional to 828,885.58, 1,143,863.85 and 489,375.70 is: 675,339.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,885.58 : 1,143,863.85 = 489,375.70 : x
  2. Step 2: Convert to fraction form
    828,885.58/1,143,863.85 = 489,375.70/x
  3. Step 3: Cross multiply
    828,885.58x = 1,143,863.85 × 489,375.70
  4. Step 4: Simplify right side
    828,885.58x = 559,779,172,298.45
  5. Step 5: Solve for x
    x = 559,779,172,298.45/828,885.58
  6. Step 6: Final answer
    x = 675,339.50

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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.