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Finding the Fourth Proportional to 1,172.48, 1,758.07 and 479.63

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Solution

The fourth proportional to 1,172.48, 1,758.07 and 479.63 is: 719.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,172.48 : 1,758.07 = 479.63 : x
  2. Step 2: Convert to fraction form
    1,172.48/1,758.07 = 479.63/x
  3. Step 3: Cross multiply
    1,172.48x = 1,758.07 × 479.63
  4. Step 4: Simplify right side
    1,172.48x = 843,226.31
  5. Step 5: Solve for x
    x = 843,226.31/1,172.48
  6. Step 6: Final answer
    x = 719.18

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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.