Home / 318,621.60-477,932.40-312,400.80

Finding the Fourth Proportional to 318,621.60, 477,932.40 and 312,400.80

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Solution

The fourth proportional to 318,621.60, 477,932.40 and 312,400.80 is: 468,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,621.60 : 477,932.40 = 312,400.80 : x
  2. Step 2: Convert to fraction form
    318,621.60/477,932.40 = 312,400.80/x
  3. Step 3: Cross multiply
    318,621.60x = 477,932.40 × 312,400.80
  4. Step 4: Simplify right side
    318,621.60x = 149,306,464,105.92
  5. Step 5: Solve for x
    x = 149,306,464,105.92/318,621.60
  6. Step 6: Final answer
    x = 468,601.20

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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.