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Finding the Fourth Proportional to 615.02, 915.56 and 611.37

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Solution

The fourth proportional to 615.02, 915.56 and 611.37 is: 910.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.02 : 915.56 = 611.37 : x
  2. Step 2: Convert to fraction form
    615.02/915.56 = 611.37/x
  3. Step 3: Cross multiply
    615.02x = 915.56 × 611.37
  4. Step 4: Simplify right side
    615.02x = 559,744.01
  5. Step 5: Solve for x
    x = 559,744.01/615.02
  6. Step 6: Final answer
    x = 910.13

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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.