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Finding the Fourth Proportional to 690.76, 952.68 and 607.69

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Solution

The fourth proportional to 690.76, 952.68 and 607.69 is: 838.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.76 : 952.68 = 607.69 : x
  2. Step 2: Convert to fraction form
    690.76/952.68 = 607.69/x
  3. Step 3: Cross multiply
    690.76x = 952.68 × 607.69
  4. Step 4: Simplify right side
    690.76x = 578,934.11
  5. Step 5: Solve for x
    x = 578,934.11/690.76
  6. Step 6: Final answer
    x = 838.11

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Double scale
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1.5x scale

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.