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Finding the Fourth Proportional to 556.40, 766.26 and 554.75

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Solution

The fourth proportional to 556.40, 766.26 and 554.75 is: 763.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.40 : 766.26 = 554.75 : x
  2. Step 2: Convert to fraction form
    556.40/766.26 = 554.75/x
  3. Step 3: Cross multiply
    556.40x = 766.26 × 554.75
  4. Step 4: Simplify right side
    556.40x = 425,081.78
  5. Step 5: Solve for x
    x = 425,081.78/556.40
  6. Step 6: Final answer
    x = 763.98

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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.