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Finding the Fourth Proportional to 958.68, 1,436.78 and 402.76

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Solution

The fourth proportional to 958.68, 1,436.78 and 402.76 is: 603.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.68 : 1,436.78 = 402.76 : x
  2. Step 2: Convert to fraction form
    958.68/1,436.78 = 402.76/x
  3. Step 3: Cross multiply
    958.68x = 1,436.78 × 402.76
  4. Step 4: Simplify right side
    958.68x = 578,677.51
  5. Step 5: Solve for x
    x = 578,677.51/958.68
  6. Step 6: Final answer
    x = 603.62

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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.