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Finding the Fourth Proportional to 935.39, 1,288.02 and 914.89

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Solution

The fourth proportional to 935.39, 1,288.02 and 914.89 is: 1,259.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.39 : 1,288.02 = 914.89 : x
  2. Step 2: Convert to fraction form
    935.39/1,288.02 = 914.89/x
  3. Step 3: Cross multiply
    935.39x = 1,288.02 × 914.89
  4. Step 4: Simplify right side
    935.39x = 1,178,392.04
  5. Step 5: Solve for x
    x = 1,178,392.04/935.39
  6. Step 6: Final answer
    x = 1,259.79

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1.5x scale

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.