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Finding the Fourth Proportional to 1,043.79, 1,440.13 and 623.97

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Solution

The fourth proportional to 1,043.79, 1,440.13 and 623.97 is: 860.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.79 : 1,440.13 = 623.97 : x
  2. Step 2: Convert to fraction form
    1,043.79/1,440.13 = 623.97/x
  3. Step 3: Cross multiply
    1,043.79x = 1,440.13 × 623.97
  4. Step 4: Simplify right side
    1,043.79x = 898,597.92
  5. Step 5: Solve for x
    x = 898,597.92/1,043.79
  6. Step 6: Final answer
    x = 860.90

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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.