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Finding the Fourth Proportional to 4,911, 7,368.12 and 1,987.71

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Solution

The fourth proportional to 4,911, 7,368.12 and 1,987.71 is: 2,982.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,911 : 7,368.12 = 1,987.71 : x
  2. Step 2: Convert to fraction form
    4,911/7,368.12 = 1,987.71/x
  3. Step 3: Cross multiply
    4,911x = 7,368.12 × 1,987.71
  4. Step 4: Simplify right side
    4,911x = 14,645,685.81
  5. Step 5: Solve for x
    x = 14,645,685.81/4,911
  6. Step 6: Final answer
    x = 2,982.22

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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.