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Finding the Fourth Proportional to 5,386.57, 8,079.86 and 1,490.99

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Solution

The fourth proportional to 5,386.57, 8,079.86 and 1,490.99 is: 2,236.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.57 : 8,079.86 = 1,490.99 : x
  2. Step 2: Convert to fraction form
    5,386.57/8,079.86 = 1,490.99/x
  3. Step 3: Cross multiply
    5,386.57x = 8,079.86 × 1,490.99
  4. Step 4: Simplify right side
    5,386.57x = 12,046,953.79
  5. Step 5: Solve for x
    x = 12,046,953.79/5,386.57
  6. Step 6: Final answer
    x = 2,236.48

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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.