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Finding the Fourth Proportional to 910.02, 1,255.74 and 556.06

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Solution

The fourth proportional to 910.02, 1,255.74 and 556.06 is: 767.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.02 : 1,255.74 = 556.06 : x
  2. Step 2: Convert to fraction form
    910.02/1,255.74 = 556.06/x
  3. Step 3: Cross multiply
    910.02x = 1,255.74 × 556.06
  4. Step 4: Simplify right side
    910.02x = 698,266.78
  5. Step 5: Solve for x
    x = 698,266.78/910.02
  6. Step 6: Final answer
    x = 767.31

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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.