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Finding the Fourth Proportional to 998.80, 1,377.48 and 802.24

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Solution

The fourth proportional to 998.80, 1,377.48 and 802.24 is: 1,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.80 : 1,377.48 = 802.24 : x
  2. Step 2: Convert to fraction form
    998.80/1,377.48 = 802.24/x
  3. Step 3: Cross multiply
    998.80x = 1,377.48 × 802.24
  4. Step 4: Simplify right side
    998.80x = 1,105,069.56
  5. Step 5: Solve for x
    x = 1,105,069.56/998.80
  6. Step 6: Final answer
    x = 1,106.40

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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.