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Finding the Fourth Proportional to 615.06, 921.96 and 340.74

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Solution

The fourth proportional to 615.06, 921.96 and 340.74 is: 510.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.06 : 921.96 = 340.74 : x
  2. Step 2: Convert to fraction form
    615.06/921.96 = 340.74/x
  3. Step 3: Cross multiply
    615.06x = 921.96 × 340.74
  4. Step 4: Simplify right side
    615.06x = 314,148.65
  5. Step 5: Solve for x
    x = 314,148.65/615.06
  6. Step 6: Final answer
    x = 510.76

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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.