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Finding the Fourth Proportional to 696.76, 1,044.90 and 389.08

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Solution

The fourth proportional to 696.76, 1,044.90 and 389.08 is: 583.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.76 : 1,044.90 = 389.08 : x
  2. Step 2: Convert to fraction form
    696.76/1,044.90 = 389.08/x
  3. Step 3: Cross multiply
    696.76x = 1,044.90 × 389.08
  4. Step 4: Simplify right side
    696.76x = 406,549.69
  5. Step 5: Solve for x
    x = 406,549.69/696.76
  6. Step 6: Final answer
    x = 583.49

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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.