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Finding the Fourth Proportional to 835.47, 1,253.05 and 315.52

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Solution

The fourth proportional to 835.47, 1,253.05 and 315.52 is: 473.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.47 : 1,253.05 = 315.52 : x
  2. Step 2: Convert to fraction form
    835.47/1,253.05 = 315.52/x
  3. Step 3: Cross multiply
    835.47x = 1,253.05 × 315.52
  4. Step 4: Simplify right side
    835.47x = 395,362.34
  5. Step 5: Solve for x
    x = 395,362.34/835.47
  6. Step 6: Final answer
    x = 473.22

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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.