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Finding the Fourth Proportional to 1,455.70, 2,171.99 and 1,352.47

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Solution

The fourth proportional to 1,455.70, 2,171.99 and 1,352.47 is: 2,017.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.70 : 2,171.99 = 1,352.47 : x
  2. Step 2: Convert to fraction form
    1,455.70/2,171.99 = 1,352.47/x
  3. Step 3: Cross multiply
    1,455.70x = 2,171.99 × 1,352.47
  4. Step 4: Simplify right side
    1,455.70x = 2,937,551.32
  5. Step 5: Solve for x
    x = 2,937,551.32/1,455.70
  6. Step 6: Final answer
    x = 2,017.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.