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Finding the Fourth Proportional to 854.19, 1,276.61 and 623.57

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Solution

The fourth proportional to 854.19, 1,276.61 and 623.57 is: 931.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.19 : 1,276.61 = 623.57 : x
  2. Step 2: Convert to fraction form
    854.19/1,276.61 = 623.57/x
  3. Step 3: Cross multiply
    854.19x = 1,276.61 × 623.57
  4. Step 4: Simplify right side
    854.19x = 796,046.20
  5. Step 5: Solve for x
    x = 796,046.20/854.19
  6. Step 6: Final answer
    x = 931.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.