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Finding the Fourth Proportional to 886,915.10, 1,330,372.65 and 818,486.30

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Solution

The fourth proportional to 886,915.10, 1,330,372.65 and 818,486.30 is: 1,227,729.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,915.10 : 1,330,372.65 = 818,486.30 : x
  2. Step 2: Convert to fraction form
    886,915.10/1,330,372.65 = 818,486.30/x
  3. Step 3: Cross multiply
    886,915.10x = 1,330,372.65 × 818,486.30
  4. Step 4: Simplify right side
    886,915.10x = 1,088,891,787,919.70
  5. Step 5: Solve for x
    x = 1,088,891,787,919.70/886,915.10
  6. Step 6: Final answer
    x = 1,227,729.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.