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Finding the Fourth Proportional to 816.56, 1,127.34 and 555.33

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Solution

The fourth proportional to 816.56, 1,127.34 and 555.33 is: 766.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.56 : 1,127.34 = 555.33 : x
  2. Step 2: Convert to fraction form
    816.56/1,127.34 = 555.33/x
  3. Step 3: Cross multiply
    816.56x = 1,127.34 × 555.33
  4. Step 4: Simplify right side
    816.56x = 626,045.72
  5. Step 5: Solve for x
    x = 626,045.72/816.56
  6. Step 6: Final answer
    x = 766.69

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Double scale
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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.