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Finding the Fourth Proportional to 4,658.60, 6,987.90 and 1,886.60

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Solution

The fourth proportional to 4,658.60, 6,987.90 and 1,886.60 is: 2,829.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,658.60 : 6,987.90 = 1,886.60 : x
  2. Step 2: Convert to fraction form
    4,658.60/6,987.90 = 1,886.60/x
  3. Step 3: Cross multiply
    4,658.60x = 6,987.90 × 1,886.60
  4. Step 4: Simplify right side
    4,658.60x = 13,183,372.14
  5. Step 5: Solve for x
    x = 13,183,372.14/4,658.60
  6. Step 6: Final answer
    x = 2,829.90

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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.