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Finding the Fourth Proportional to 1,314.65, 1,972.10 and 493.51

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Solution

The fourth proportional to 1,314.65, 1,972.10 and 493.51 is: 740.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.65 : 1,972.10 = 493.51 : x
  2. Step 2: Convert to fraction form
    1,314.65/1,972.10 = 493.51/x
  3. Step 3: Cross multiply
    1,314.65x = 1,972.10 × 493.51
  4. Step 4: Simplify right side
    1,314.65x = 973,251.07
  5. Step 5: Solve for x
    x = 973,251.07/1,314.65
  6. Step 6: Final answer
    x = 740.31

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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.