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Finding the Fourth Proportional to 963.23, 1,328.38 and 715.18

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Solution

The fourth proportional to 963.23, 1,328.38 and 715.18 is: 986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.23 : 1,328.38 = 715.18 : x
  2. Step 2: Convert to fraction form
    963.23/1,328.38 = 715.18/x
  3. Step 3: Cross multiply
    963.23x = 1,328.38 × 715.18
  4. Step 4: Simplify right side
    963.23x = 950,030.81
  5. Step 5: Solve for x
    x = 950,030.81/963.23
  6. Step 6: Final answer
    x = 986.30

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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.