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Finding the Fourth Proportional to 526, 726 and 319.12

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Solution

The fourth proportional to 526, 726 and 319.12 is: 440.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    526 : 726 = 319.12 : x
  2. Step 2: Convert to fraction form
    526/726 = 319.12/x
  3. Step 3: Cross multiply
    526x = 726 × 319.12
  4. Step 4: Simplify right side
    526x = 231,681.12
  5. Step 5: Solve for x
    x = 231,681.12/526
  6. Step 6: Final answer
    x = 440.46

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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.