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Finding the Fourth Proportional to 697.16, 961.52 and 618.53

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Solution

The fourth proportional to 697.16, 961.52 and 618.53 is: 853.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.16 : 961.52 = 618.53 : x
  2. Step 2: Convert to fraction form
    697.16/961.52 = 618.53/x
  3. Step 3: Cross multiply
    697.16x = 961.52 × 618.53
  4. Step 4: Simplify right side
    697.16x = 594,721.07
  5. Step 5: Solve for x
    x = 594,721.07/697.16
  6. Step 6: Final answer
    x = 853.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.