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Finding the Fourth Proportional to 616.82, 920.45 and 551.12

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Solution

The fourth proportional to 616.82, 920.45 and 551.12 is: 822.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.82 : 920.45 = 551.12 : x
  2. Step 2: Convert to fraction form
    616.82/920.45 = 551.12/x
  3. Step 3: Cross multiply
    616.82x = 920.45 × 551.12
  4. Step 4: Simplify right side
    616.82x = 507,278.40
  5. Step 5: Solve for x
    x = 507,278.40/616.82
  6. Step 6: Final answer
    x = 822.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.