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Finding the Fourth Proportional to 5,386.58, 8,079.85 and 1,490.97

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Solution

The fourth proportional to 5,386.58, 8,079.85 and 1,490.97 is: 2,236.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.58 : 8,079.85 = 1,490.97 : x
  2. Step 2: Convert to fraction form
    5,386.58/8,079.85 = 1,490.97/x
  3. Step 3: Cross multiply
    5,386.58x = 8,079.85 × 1,490.97
  4. Step 4: Simplify right side
    5,386.58x = 12,046,813.95
  5. Step 5: Solve for x
    x = 12,046,813.95/5,386.58
  6. Step 6: Final answer
    x = 2,236.45

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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.