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Finding the Fourth Proportional to 1,562.85, 2,156.34 and 933.12

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Solution

The fourth proportional to 1,562.85, 2,156.34 and 933.12 is: 1,287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.85 : 2,156.34 = 933.12 : x
  2. Step 2: Convert to fraction form
    1,562.85/2,156.34 = 933.12/x
  3. Step 3: Cross multiply
    1,562.85x = 2,156.34 × 933.12
  4. Step 4: Simplify right side
    1,562.85x = 2,012,128.57
  5. Step 5: Solve for x
    x = 2,012,128.57/1,562.85
  6. Step 6: Final answer
    x = 1,287.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.