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Finding the Fourth Proportional to 2,810.40, 4,215.64 and 862.62

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Solution

The fourth proportional to 2,810.40, 4,215.64 and 862.62 is: 1,293.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.40 : 4,215.64 = 862.62 : x
  2. Step 2: Convert to fraction form
    2,810.40/4,215.64 = 862.62/x
  3. Step 3: Cross multiply
    2,810.40x = 4,215.64 × 862.62
  4. Step 4: Simplify right side
    2,810.40x = 3,636,495.38
  5. Step 5: Solve for x
    x = 3,636,495.38/2,810.40
  6. Step 6: Final answer
    x = 1,293.94

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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.