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Finding the Fourth Proportional to 616.20, 920.01 and 554.76

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Solution

The fourth proportional to 616.20, 920.01 and 554.76 is: 828.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.20 : 920.01 = 554.76 : x
  2. Step 2: Convert to fraction form
    616.20/920.01 = 554.76/x
  3. Step 3: Cross multiply
    616.20x = 920.01 × 554.76
  4. Step 4: Simplify right side
    616.20x = 510,384.75
  5. Step 5: Solve for x
    x = 510,384.75/616.20
  6. Step 6: Final answer
    x = 828.28

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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.