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Finding the Fourth Proportional to 613.98, 915.57 and 608.51

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Solution

The fourth proportional to 613.98, 915.57 and 608.51 is: 907.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.98 : 915.57 = 608.51 : x
  2. Step 2: Convert to fraction form
    613.98/915.57 = 608.51/x
  3. Step 3: Cross multiply
    613.98x = 915.57 × 608.51
  4. Step 4: Simplify right side
    613.98x = 557,128.92
  5. Step 5: Solve for x
    x = 557,128.92/613.98
  6. Step 6: Final answer
    x = 907.41

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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.