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Finding the Fourth Proportional to 880.83, 1,321.70 and 393.93

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Solution

The fourth proportional to 880.83, 1,321.70 and 393.93 is: 591.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.83 : 1,321.70 = 393.93 : x
  2. Step 2: Convert to fraction form
    880.83/1,321.70 = 393.93/x
  3. Step 3: Cross multiply
    880.83x = 1,321.70 × 393.93
  4. Step 4: Simplify right side
    880.83x = 520,655.31
  5. Step 5: Solve for x
    x = 520,655.31/880.83
  6. Step 6: Final answer
    x = 591.10

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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.