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Finding the Fourth Proportional to 7,318.86, 10,978.31 and 1,772.19

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Solution

The fourth proportional to 7,318.86, 10,978.31 and 1,772.19 is: 2,658.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.86 : 10,978.31 = 1,772.19 : x
  2. Step 2: Convert to fraction form
    7,318.86/10,978.31 = 1,772.19/x
  3. Step 3: Cross multiply
    7,318.86x = 10,978.31 × 1,772.19
  4. Step 4: Simplify right side
    7,318.86x = 19,455,619.77
  5. Step 5: Solve for x
    x = 19,455,619.77/7,318.86
  6. Step 6: Final answer
    x = 2,658.29

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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.