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Finding the Fourth Proportional to 4,917.70, 7,368.45 and 4,188.70

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Solution

The fourth proportional to 4,917.70, 7,368.45 and 4,188.70 is: 6,276.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,917.70 : 7,368.45 = 4,188.70 : x
  2. Step 2: Convert to fraction form
    4,917.70/7,368.45 = 4,188.70/x
  3. Step 3: Cross multiply
    4,917.70x = 7,368.45 × 4,188.70
  4. Step 4: Simplify right side
    4,917.70x = 30,864,226.52
  5. Step 5: Solve for x
    x = 30,864,226.52/4,917.70
  6. Step 6: Final answer
    x = 6,276.15

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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.