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Finding the Fourth Proportional to 986.60, 1,473.55 and 893.86

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Solution

The fourth proportional to 986.60, 1,473.55 and 893.86 is: 1,335.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.60 : 1,473.55 = 893.86 : x
  2. Step 2: Convert to fraction form
    986.60/1,473.55 = 893.86/x
  3. Step 3: Cross multiply
    986.60x = 1,473.55 × 893.86
  4. Step 4: Simplify right side
    986.60x = 1,317,141.48
  5. Step 5: Solve for x
    x = 1,317,141.48/986.60
  6. Step 6: Final answer
    x = 1,335.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.