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Finding the Fourth Proportional to 5,590.50, 8,385.75 and 1,486.50

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Solution

The fourth proportional to 5,590.50, 8,385.75 and 1,486.50 is: 2,229.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,590.50 : 8,385.75 = 1,486.50 : x
  2. Step 2: Convert to fraction form
    5,590.50/8,385.75 = 1,486.50/x
  3. Step 3: Cross multiply
    5,590.50x = 8,385.75 × 1,486.50
  4. Step 4: Simplify right side
    5,590.50x = 12,465,417.38
  5. Step 5: Solve for x
    x = 12,465,417.38/5,590.50
  6. Step 6: Final answer
    x = 2,229.75

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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.