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Finding the Fourth Proportional to 5,316, 7,978.08 and 2,718.72

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Solution

The fourth proportional to 5,316, 7,978.08 and 2,718.72 is: 4,080.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,316 : 7,978.08 = 2,718.72 : x
  2. Step 2: Convert to fraction form
    5,316/7,978.08 = 2,718.72/x
  3. Step 3: Cross multiply
    5,316x = 7,978.08 × 2,718.72
  4. Step 4: Simplify right side
    5,316x = 21,690,165.66
  5. Step 5: Solve for x
    x = 21,690,165.66/5,316
  6. Step 6: Final answer
    x = 4,080.17

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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.