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Finding the Fourth Proportional to 887.74, 1,225.11 and 556.06

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Solution

The fourth proportional to 887.74, 1,225.11 and 556.06 is: 767.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.74 : 1,225.11 = 556.06 : x
  2. Step 2: Convert to fraction form
    887.74/1,225.11 = 556.06/x
  3. Step 3: Cross multiply
    887.74x = 1,225.11 × 556.06
  4. Step 4: Simplify right side
    887.74x = 681,234.67
  5. Step 5: Solve for x
    x = 681,234.67/887.74
  6. Step 6: Final answer
    x = 767.38

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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.