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Finding the Fourth Proportional to 803.13, 1,205.16 and 340.89

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Solution

The fourth proportional to 803.13, 1,205.16 and 340.89 is: 511.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.13 : 1,205.16 = 340.89 : x
  2. Step 2: Convert to fraction form
    803.13/1,205.16 = 340.89/x
  3. Step 3: Cross multiply
    803.13x = 1,205.16 × 340.89
  4. Step 4: Simplify right side
    803.13x = 410,826.99
  5. Step 5: Solve for x
    x = 410,826.99/803.13
  6. Step 6: Final answer
    x = 511.53

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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.