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Finding the Fourth Proportional to 615.28, 847.92 and 440.32

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Solution

The fourth proportional to 615.28, 847.92 and 440.32 is: 606.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.28 : 847.92 = 440.32 : x
  2. Step 2: Convert to fraction form
    615.28/847.92 = 440.32/x
  3. Step 3: Cross multiply
    615.28x = 847.92 × 440.32
  4. Step 4: Simplify right side
    615.28x = 373,356.13
  5. Step 5: Solve for x
    x = 373,356.13/615.28
  6. Step 6: Final answer
    x = 606.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.