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Finding the Fourth Proportional to 911,503,609.80, 1,257,876,257.90 and 493,815,895.10

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Solution

The fourth proportional to 911,503,609.80, 1,257,876,257.90 and 493,815,895.10 is: 681,466,626.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,503,609.80 : 1,257,876,257.90 = 493,815,895.10 : x
  2. Step 2: Convert to fraction form
    911,503,609.80/1,257,876,257.90 = 493,815,895.10/x
  3. Step 3: Cross multiply
    911,503,609.80x = 1,257,876,257.90 × 493,815,895.10
  4. Step 4: Simplify right side
    911,503,609.80x = 621,159,290,211,168,512
  5. Step 5: Solve for x
    x = 621,159,290,211,168,512/911,503,609.80
  6. Step 6: Final answer
    x = 681,466,626.72

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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.