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Finding the Fourth Proportional to 936.55, 1,403.61 and 607.69

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Solution

The fourth proportional to 936.55, 1,403.61 and 607.69 is: 910.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.55 : 1,403.61 = 607.69 : x
  2. Step 2: Convert to fraction form
    936.55/1,403.61 = 607.69/x
  3. Step 3: Cross multiply
    936.55x = 1,403.61 × 607.69
  4. Step 4: Simplify right side
    936.55x = 852,959.76
  5. Step 5: Solve for x
    x = 852,959.76/936.55
  6. Step 6: Final answer
    x = 910.75

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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.