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Finding the Fourth Proportional to 958.40, 1,436.38 and 410.44

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Solution

The fourth proportional to 958.40, 1,436.38 and 410.44 is: 615.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.40 : 1,436.38 = 410.44 : x
  2. Step 2: Convert to fraction form
    958.40/1,436.38 = 410.44/x
  3. Step 3: Cross multiply
    958.40x = 1,436.38 × 410.44
  4. Step 4: Simplify right side
    958.40x = 589,547.81
  5. Step 5: Solve for x
    x = 589,547.81/958.40
  6. Step 6: Final answer
    x = 615.14

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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.