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Finding the Fourth Proportional to 879,420, 1,318,793.73 and 479,847.18

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Solution

The fourth proportional to 879,420, 1,318,793.73 and 479,847.18 is: 719,587.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,420 : 1,318,793.73 = 479,847.18 : x
  2. Step 2: Convert to fraction form
    879,420/1,318,793.73 = 479,847.18/x
  3. Step 3: Cross multiply
    879,420x = 1,318,793.73 × 479,847.18
  4. Step 4: Simplify right side
    879,420x = 632,819,452,342.18
  5. Step 5: Solve for x
    x = 632,819,452,342.18/879,420
  6. Step 6: Final answer
    x = 719,587.29

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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.