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Finding the Fourth Proportional to 700.40, 1,049.68 and 626.88

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Solution

The fourth proportional to 700.40, 1,049.68 and 626.88 is: 939.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.40 : 1,049.68 = 626.88 : x
  2. Step 2: Convert to fraction form
    700.40/1,049.68 = 626.88/x
  3. Step 3: Cross multiply
    700.40x = 1,049.68 × 626.88
  4. Step 4: Simplify right side
    700.40x = 658,023.40
  5. Step 5: Solve for x
    x = 658,023.40/700.40
  6. Step 6: Final answer
    x = 939.50

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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.