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Finding the Fourth Proportional to 865,676.80, 1,298,515.20 and 832,499.20

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Solution

The fourth proportional to 865,676.80, 1,298,515.20 and 832,499.20 is: 1,248,748.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,676.80 : 1,298,515.20 = 832,499.20 : x
  2. Step 2: Convert to fraction form
    865,676.80/1,298,515.20 = 832,499.20/x
  3. Step 3: Cross multiply
    865,676.80x = 1,298,515.20 × 832,499.20
  4. Step 4: Simplify right side
    865,676.80x = 1,081,012,865,187.84
  5. Step 5: Solve for x
    x = 1,081,012,865,187.84/865,676.80
  6. Step 6: Final answer
    x = 1,248,748.80

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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.