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Finding the Fourth Proportional to 691.79, 954.63 and 377.03

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Solution

The fourth proportional to 691.79, 954.63 and 377.03 is: 520.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.79 : 954.63 = 377.03 : x
  2. Step 2: Convert to fraction form
    691.79/954.63 = 377.03/x
  3. Step 3: Cross multiply
    691.79x = 954.63 × 377.03
  4. Step 4: Simplify right side
    691.79x = 359,919.38
  5. Step 5: Solve for x
    x = 359,919.38/691.79
  6. Step 6: Final answer
    x = 520.28

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Half scale
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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.