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Finding the Fourth Proportional to 798.20, 1,101.51 and 448.88

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Solution

The fourth proportional to 798.20, 1,101.51 and 448.88 is: 619.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.20 : 1,101.51 = 448.88 : x
  2. Step 2: Convert to fraction form
    798.20/1,101.51 = 448.88/x
  3. Step 3: Cross multiply
    798.20x = 1,101.51 × 448.88
  4. Step 4: Simplify right side
    798.20x = 494,445.81
  5. Step 5: Solve for x
    x = 494,445.81/798.20
  6. Step 6: Final answer
    x = 619.45

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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.