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Finding the Fourth Proportional to 526.60, 726.47 and 316.65

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Solution

The fourth proportional to 526.60, 726.47 and 316.65 is: 436.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.60 : 726.47 = 316.65 : x
  2. Step 2: Convert to fraction form
    526.60/726.47 = 316.65/x
  3. Step 3: Cross multiply
    526.60x = 726.47 × 316.65
  4. Step 4: Simplify right side
    526.60x = 230,040.84
  5. Step 5: Solve for x
    x = 230,040.84/526.60
  6. Step 6: Final answer
    x = 436.84

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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.