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Finding the Fourth Proportional to 879,620.80, 1,319,431.20 and 667,044.40

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Solution

The fourth proportional to 879,620.80, 1,319,431.20 and 667,044.40 is: 1,000,566.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,620.80 : 1,319,431.20 = 667,044.40 : x
  2. Step 2: Convert to fraction form
    879,620.80/1,319,431.20 = 667,044.40/x
  3. Step 3: Cross multiply
    879,620.80x = 1,319,431.20 × 667,044.40
  4. Step 4: Simplify right side
    879,620.80x = 880,119,193,145.28
  5. Step 5: Solve for x
    x = 880,119,193,145.28/879,620.80
  6. Step 6: Final answer
    x = 1,000,566.60

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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.