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Finding the Fourth Proportional to 2,650,658.40, 3,978,061.20 and 1,230,890.40

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Solution

The fourth proportional to 2,650,658.40, 3,978,061.20 and 1,230,890.40 is: 1,847,298.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,650,658.40 : 3,978,061.20 = 1,230,890.40 : x
  2. Step 2: Convert to fraction form
    2,650,658.40/3,978,061.20 = 1,230,890.40/x
  3. Step 3: Cross multiply
    2,650,658.40x = 3,978,061.20 × 1,230,890.40
  4. Step 4: Simplify right side
    2,650,658.40x = 4,896,557,341,692.48
  5. Step 5: Solve for x
    x = 4,896,557,341,692.48/2,650,658.40
  6. Step 6: Final answer
    x = 1,847,298.52

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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.