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Finding the Fourth Proportional to 998.10, 1,377.52 and 578.48

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Solution

The fourth proportional to 998.10, 1,377.52 and 578.48 is: 798.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.10 : 1,377.52 = 578.48 : x
  2. Step 2: Convert to fraction form
    998.10/1,377.52 = 578.48/x
  3. Step 3: Cross multiply
    998.10x = 1,377.52 × 578.48
  4. Step 4: Simplify right side
    998.10x = 796,867.77
  5. Step 5: Solve for x
    x = 796,867.77/998.10
  6. Step 6: Final answer
    x = 798.38

Related Problems

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Half scale
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Double scale
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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.