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Finding the Fourth Proportional to 798.30, 1,101.69 and 449.01

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Solution

The fourth proportional to 798.30, 1,101.69 and 449.01 is: 619.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.30 : 1,101.69 = 449.01 : x
  2. Step 2: Convert to fraction form
    798.30/1,101.69 = 449.01/x
  3. Step 3: Cross multiply
    798.30x = 1,101.69 × 449.01
  4. Step 4: Simplify right side
    798.30x = 494,669.83
  5. Step 5: Solve for x
    x = 494,669.83/798.30
  6. Step 6: Final answer
    x = 619.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.