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Finding the Fourth Proportional to 556.40, 833.90 and 263.90

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Solution

The fourth proportional to 556.40, 833.90 and 263.90 is: 395.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.40 : 833.90 = 263.90 : x
  2. Step 2: Convert to fraction form
    556.40/833.90 = 263.90/x
  3. Step 3: Cross multiply
    556.40x = 833.90 × 263.90
  4. Step 4: Simplify right side
    556.40x = 220,060.72
  5. Step 5: Solve for x
    x = 220,060.72/556.40
  6. Step 6: Final answer
    x = 395.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.