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Finding the Fourth Proportional to 615.32, 921.28 and 470.36

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Solution

The fourth proportional to 615.32, 921.28 and 470.36 is: 704.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.32 : 921.28 = 470.36 : x
  2. Step 2: Convert to fraction form
    615.32/921.28 = 470.36/x
  3. Step 3: Cross multiply
    615.32x = 921.28 × 470.36
  4. Step 4: Simplify right side
    615.32x = 433,333.26
  5. Step 5: Solve for x
    x = 433,333.26/615.32
  6. Step 6: Final answer
    x = 704.24

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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.