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Finding the Fourth Proportional to 813.36, 1,122.32 and 552.16

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Solution

The fourth proportional to 813.36, 1,122.32 and 552.16 is: 761.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.36 : 1,122.32 = 552.16 : x
  2. Step 2: Convert to fraction form
    813.36/1,122.32 = 552.16/x
  3. Step 3: Cross multiply
    813.36x = 1,122.32 × 552.16
  4. Step 4: Simplify right side
    813.36x = 619,700.21
  5. Step 5: Solve for x
    x = 619,700.21/813.36
  6. Step 6: Final answer
    x = 761.90

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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.