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Finding the Fourth Proportional to 556.30, 833.64 and 393.90

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Solution

The fourth proportional to 556.30, 833.64 and 393.90 is: 590.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.30 : 833.64 = 393.90 : x
  2. Step 2: Convert to fraction form
    556.30/833.64 = 393.90/x
  3. Step 3: Cross multiply
    556.30x = 833.64 × 393.90
  4. Step 4: Simplify right side
    556.30x = 328,370.80
  5. Step 5: Solve for x
    x = 328,370.80/556.30
  6. Step 6: Final answer
    x = 590.28

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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.