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Finding the Fourth Proportional to 863.16, 1,191.12 and 509.04

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Solution

The fourth proportional to 863.16, 1,191.12 and 509.04 is: 702.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.16 : 1,191.12 = 509.04 : x
  2. Step 2: Convert to fraction form
    863.16/1,191.12 = 509.04/x
  3. Step 3: Cross multiply
    863.16x = 1,191.12 × 509.04
  4. Step 4: Simplify right side
    863.16x = 606,327.72
  5. Step 5: Solve for x
    x = 606,327.72/863.16
  6. Step 6: Final answer
    x = 702.45

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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.