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Finding the Fourth Proportional to 383,437.20, 575,155.80 and 215,475.60

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Solution

The fourth proportional to 383,437.20, 575,155.80 and 215,475.60 is: 323,213.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,437.20 : 575,155.80 = 215,475.60 : x
  2. Step 2: Convert to fraction form
    383,437.20/575,155.80 = 215,475.60/x
  3. Step 3: Cross multiply
    383,437.20x = 575,155.80 × 215,475.60
  4. Step 4: Simplify right side
    383,437.20x = 123,932,041,098.48
  5. Step 5: Solve for x
    x = 123,932,041,098.48/383,437.20
  6. Step 6: Final answer
    x = 323,213.40

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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.