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Finding the Fourth Proportional to 4,887.90, 7,317.45 and 4,311.90

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Solution

The fourth proportional to 4,887.90, 7,317.45 and 4,311.90 is: 6,455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,887.90 : 7,317.45 = 4,311.90 : x
  2. Step 2: Convert to fraction form
    4,887.90/7,317.45 = 4,311.90/x
  3. Step 3: Cross multiply
    4,887.90x = 7,317.45 × 4,311.90
  4. Step 4: Simplify right side
    4,887.90x = 31,552,112.66
  5. Step 5: Solve for x
    x = 31,552,112.66/4,887.90
  6. Step 6: Final answer
    x = 6,455.15

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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.