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Finding the Fourth Proportional to 1,859.20, 2,788.90 and 626.99

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Solution

The fourth proportional to 1,859.20, 2,788.90 and 626.99 is: 940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.20 : 2,788.90 = 626.99 : x
  2. Step 2: Convert to fraction form
    1,859.20/2,788.90 = 626.99/x
  3. Step 3: Cross multiply
    1,859.20x = 2,788.90 × 626.99
  4. Step 4: Simplify right side
    1,859.20x = 1,748,596.90
  5. Step 5: Solve for x
    x = 1,748,596.90/1,859.20
  6. Step 6: Final answer
    x = 940.51

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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.