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Finding the Fourth Proportional to 4,158.70, 6,238.17 and 1,038.70

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Solution

The fourth proportional to 4,158.70, 6,238.17 and 1,038.70 is: 1,558.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,158.70 : 6,238.17 = 1,038.70 : x
  2. Step 2: Convert to fraction form
    4,158.70/6,238.17 = 1,038.70/x
  3. Step 3: Cross multiply
    4,158.70x = 6,238.17 × 1,038.70
  4. Step 4: Simplify right side
    4,158.70x = 6,479,587.18
  5. Step 5: Solve for x
    x = 6,479,587.18/4,158.70
  6. Step 6: Final answer
    x = 1,558.08

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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.