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Finding the Fourth Proportional to 615.13, 915.99 and 608.31

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Solution

The fourth proportional to 615.13, 915.99 and 608.31 is: 905.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.13 : 915.99 = 608.31 : x
  2. Step 2: Convert to fraction form
    615.13/915.99 = 608.31/x
  3. Step 3: Cross multiply
    615.13x = 915.99 × 608.31
  4. Step 4: Simplify right side
    615.13x = 557,207.02
  5. Step 5: Solve for x
    x = 557,207.02/615.13
  6. Step 6: Final answer
    x = 905.84

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Why These Related Problems?

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