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Finding the Fourth Proportional to 879,675.60, 1,318,930.20 and 318,637.20

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Solution

The fourth proportional to 879,675.60, 1,318,930.20 and 318,637.20 is: 477,744.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,675.60 : 1,318,930.20 = 318,637.20 : x
  2. Step 2: Convert to fraction form
    879,675.60/1,318,930.20 = 318,637.20/x
  3. Step 3: Cross multiply
    879,675.60x = 1,318,930.20 × 318,637.20
  4. Step 4: Simplify right side
    879,675.60x = 420,260,225,923.44
  5. Step 5: Solve for x
    x = 420,260,225,923.44/879,675.60
  6. Step 6: Final answer
    x = 477,744.55

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1.5x scale

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.