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Finding the Fourth Proportional to 897.98, 1,346.55 and 320.87

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Solution

The fourth proportional to 897.98, 1,346.55 and 320.87 is: 481.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.98 : 1,346.55 = 320.87 : x
  2. Step 2: Convert to fraction form
    897.98/1,346.55 = 320.87/x
  3. Step 3: Cross multiply
    897.98x = 1,346.55 × 320.87
  4. Step 4: Simplify right side
    897.98x = 432,067.50
  5. Step 5: Solve for x
    x = 432,067.50/897.98
  6. Step 6: Final answer
    x = 481.15

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.