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Finding the Fourth Proportional to 4,394, 6,591.78 and 1,316.72

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Solution

The fourth proportional to 4,394, 6,591.78 and 1,316.72 is: 1,975.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,394 : 6,591.78 = 1,316.72 : x
  2. Step 2: Convert to fraction form
    4,394/6,591.78 = 1,316.72/x
  3. Step 3: Cross multiply
    4,394x = 6,591.78 × 1,316.72
  4. Step 4: Simplify right side
    4,394x = 8,679,528.56
  5. Step 5: Solve for x
    x = 8,679,528.56/4,394
  6. Step 6: Final answer
    x = 1,975.31

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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.