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Finding the Fourth Proportional to 613.22, 915.35 and 570.49

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Solution

The fourth proportional to 613.22, 915.35 and 570.49 is: 851.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.22 : 915.35 = 570.49 : x
  2. Step 2: Convert to fraction form
    613.22/915.35 = 570.49/x
  3. Step 3: Cross multiply
    613.22x = 915.35 × 570.49
  4. Step 4: Simplify right side
    613.22x = 522,192.88
  5. Step 5: Solve for x
    x = 522,192.88/613.22
  6. Step 6: Final answer
    x = 851.57

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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.