Home / 1,277.40-1,914.30-626.70

Finding the Fourth Proportional to 1,277.40, 1,914.30 and 626.70

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Solution

The fourth proportional to 1,277.40, 1,914.30 and 626.70 is: 939.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.40 : 1,914.30 = 626.70 : x
  2. Step 2: Convert to fraction form
    1,277.40/1,914.30 = 626.70/x
  3. Step 3: Cross multiply
    1,277.40x = 1,914.30 × 626.70
  4. Step 4: Simplify right side
    1,277.40x = 1,199,691.81
  5. Step 5: Solve for x
    x = 1,199,691.81/1,277.40
  6. Step 6: Final answer
    x = 939.17

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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.