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Finding the Fourth Proportional to 614.74, 921.30 and 340.96

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Solution

The fourth proportional to 614.74, 921.30 and 340.96 is: 510.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.74 : 921.30 = 340.96 : x
  2. Step 2: Convert to fraction form
    614.74/921.30 = 340.96/x
  3. Step 3: Cross multiply
    614.74x = 921.30 × 340.96
  4. Step 4: Simplify right side
    614.74x = 314,126.45
  5. Step 5: Solve for x
    x = 314,126.45/614.74
  6. Step 6: Final answer
    x = 510.99

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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.