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Finding the Fourth Proportional to 1,239.92, 1,859.33 and 623.51

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Solution

The fourth proportional to 1,239.92, 1,859.33 and 623.51 is: 934.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.92 : 1,859.33 = 623.51 : x
  2. Step 2: Convert to fraction form
    1,239.92/1,859.33 = 623.51/x
  3. Step 3: Cross multiply
    1,239.92x = 1,859.33 × 623.51
  4. Step 4: Simplify right side
    1,239.92x = 1,159,310.85
  5. Step 5: Solve for x
    x = 1,159,310.85/1,239.92
  6. Step 6: Final answer
    x = 934.99

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1.5x scale

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.