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Finding the Fourth Proportional to 879,625.80, 1,319,438.70 and 667,049.40

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Solution

The fourth proportional to 879,625.80, 1,319,438.70 and 667,049.40 is: 1,000,574.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,625.80 : 1,319,438.70 = 667,049.40 : x
  2. Step 2: Convert to fraction form
    879,625.80/1,319,438.70 = 667,049.40/x
  3. Step 3: Cross multiply
    879,625.80x = 1,319,438.70 × 667,049.40
  4. Step 4: Simplify right side
    879,625.80x = 880,130,793,171.78
  5. Step 5: Solve for x
    x = 880,130,793,171.78/879,625.80
  6. Step 6: Final answer
    x = 1,000,574.10

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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.