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Finding the Fourth Proportional to 630.77, 945.79 and 191.89

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Solution

The fourth proportional to 630.77, 945.79 and 191.89 is: 287.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.77 : 945.79 = 191.89 : x
  2. Step 2: Convert to fraction form
    630.77/945.79 = 191.89/x
  3. Step 3: Cross multiply
    630.77x = 945.79 × 191.89
  4. Step 4: Simplify right side
    630.77x = 181,483.38
  5. Step 5: Solve for x
    x = 181,483.38/630.77
  6. Step 6: Final answer
    x = 287.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.