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Finding the Fourth Proportional to 690.79, 952.86 and 607.90

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Solution

The fourth proportional to 690.79, 952.86 and 607.90 is: 838.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.79 : 952.86 = 607.90 : x
  2. Step 2: Convert to fraction form
    690.79/952.86 = 607.90/x
  3. Step 3: Cross multiply
    690.79x = 952.86 × 607.90
  4. Step 4: Simplify right side
    690.79x = 579,243.59
  5. Step 5: Solve for x
    x = 579,243.59/690.79
  6. Step 6: Final answer
    x = 838.52

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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.