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Finding the Fourth Proportional to 613.74, 915.27 and 555.42

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Solution

The fourth proportional to 613.74, 915.27 and 555.42 is: 828.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.74 : 915.27 = 555.42 : x
  2. Step 2: Convert to fraction form
    613.74/915.27 = 555.42/x
  3. Step 3: Cross multiply
    613.74x = 915.27 × 555.42
  4. Step 4: Simplify right side
    613.74x = 508,359.26
  5. Step 5: Solve for x
    x = 508,359.26/613.74
  6. Step 6: Final answer
    x = 828.30

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.