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Finding the Fourth Proportional to 835.56, 1,151.40 and 555.48

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Solution

The fourth proportional to 835.56, 1,151.40 and 555.48 is: 765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.56 : 1,151.40 = 555.48 : x
  2. Step 2: Convert to fraction form
    835.56/1,151.40 = 555.48/x
  3. Step 3: Cross multiply
    835.56x = 1,151.40 × 555.48
  4. Step 4: Simplify right side
    835.56x = 639,579.67
  5. Step 5: Solve for x
    x = 639,579.67/835.56
  6. Step 6: Final answer
    x = 765.45

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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.