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Finding the Fourth Proportional to 317,811.20, 477,105.60 and 315,478.40

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Solution

The fourth proportional to 317,811.20, 477,105.60 and 315,478.40 is: 473,603.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,811.20 : 477,105.60 = 315,478.40 : x
  2. Step 2: Convert to fraction form
    317,811.20/477,105.60 = 315,478.40/x
  3. Step 3: Cross multiply
    317,811.20x = 477,105.60 × 315,478.40
  4. Step 4: Simplify right side
    317,811.20x = 150,516,511,319.04
  5. Step 5: Solve for x
    x = 150,516,511,319.04/317,811.20
  6. Step 6: Final answer
    x = 473,603.55

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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.