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Finding the Fourth Proportional to 5,386.09, 8,079.14 and 1,490.50

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Solution

The fourth proportional to 5,386.09, 8,079.14 and 1,490.50 is: 2,235.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.09 : 8,079.14 = 1,490.50 : x
  2. Step 2: Convert to fraction form
    5,386.09/8,079.14 = 1,490.50/x
  3. Step 3: Cross multiply
    5,386.09x = 8,079.14 × 1,490.50
  4. Step 4: Simplify right side
    5,386.09x = 12,041,958.17
  5. Step 5: Solve for x
    x = 12,041,958.17/5,386.09
  6. Step 6: Final answer
    x = 2,235.75

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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.