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Finding the Fourth Proportional to 805.66, 1,111.08 and 556.54

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Solution

The fourth proportional to 805.66, 1,111.08 and 556.54 is: 767.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.66 : 1,111.08 = 556.54 : x
  2. Step 2: Convert to fraction form
    805.66/1,111.08 = 556.54/x
  3. Step 3: Cross multiply
    805.66x = 1,111.08 × 556.54
  4. Step 4: Simplify right side
    805.66x = 618,360.46
  5. Step 5: Solve for x
    x = 618,360.46/805.66
  6. Step 6: Final answer
    x = 767.52

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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.