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Finding the Fourth Proportional to 5,485.86, 8,230.14 and 1,590.21

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Solution

The fourth proportional to 5,485.86, 8,230.14 and 1,590.21 is: 2,385.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,485.86 : 8,230.14 = 1,590.21 : x
  2. Step 2: Convert to fraction form
    5,485.86/8,230.14 = 1,590.21/x
  3. Step 3: Cross multiply
    5,485.86x = 8,230.14 × 1,590.21
  4. Step 4: Simplify right side
    5,485.86x = 13,087,650.93
  5. Step 5: Solve for x
    x = 13,087,650.93/5,485.86
  6. Step 6: Final answer
    x = 2,385.71

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Half scale
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Double scale
Find fourth proportional to 5,486.86, 8,231.64 and 1,591.21
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.