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Finding the Fourth Proportional to 926.99, 1,278.20 and 693.71

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Solution

The fourth proportional to 926.99, 1,278.20 and 693.71 is: 956.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.99 : 1,278.20 = 693.71 : x
  2. Step 2: Convert to fraction form
    926.99/1,278.20 = 693.71/x
  3. Step 3: Cross multiply
    926.99x = 1,278.20 × 693.71
  4. Step 4: Simplify right side
    926.99x = 886,696.65
  5. Step 5: Solve for x
    x = 886,696.65/926.99
  6. Step 6: Final answer
    x = 956.53

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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.