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Finding the Fourth Proportional to 613.60, 915.01 and 608.13

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Solution

The fourth proportional to 613.60, 915.01 and 608.13 is: 906.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.60 : 915.01 = 608.13 : x
  2. Step 2: Convert to fraction form
    613.60/915.01 = 608.13/x
  3. Step 3: Cross multiply
    613.60x = 915.01 × 608.13
  4. Step 4: Simplify right side
    613.60x = 556,443.51
  5. Step 5: Solve for x
    x = 556,443.51/613.60
  6. Step 6: Final answer
    x = 906.85

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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.