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Finding the Fourth Proportional to 556.90, 771.77 and 549.07

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Solution

The fourth proportional to 556.90, 771.77 and 549.07 is: 760.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.90 : 771.77 = 549.07 : x
  2. Step 2: Convert to fraction form
    556.90/771.77 = 549.07/x
  3. Step 3: Cross multiply
    556.90x = 771.77 × 549.07
  4. Step 4: Simplify right side
    556.90x = 423,754.38
  5. Step 5: Solve for x
    x = 423,754.38/556.90
  6. Step 6: Final answer
    x = 760.92

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.