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Finding the Fourth Proportional to 879,658.60, 1,319,487.90 and 800,926.60

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Solution

The fourth proportional to 879,658.60, 1,319,487.90 and 800,926.60 is: 1,201,389.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,658.60 : 1,319,487.90 = 800,926.60 : x
  2. Step 2: Convert to fraction form
    879,658.60/1,319,487.90 = 800,926.60/x
  3. Step 3: Cross multiply
    879,658.60x = 1,319,487.90 × 800,926.60
  4. Step 4: Simplify right side
    879,658.60x = 1,056,812,957,488.14
  5. Step 5: Solve for x
    x = 1,056,812,957,488.14/879,658.60
  6. Step 6: Final answer
    x = 1,201,389.90

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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.