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Finding the Fourth Proportional to 1,077.40, 1,486.14 and 683.74

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Solution

The fourth proportional to 1,077.40, 1,486.14 and 683.74 is: 943.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.40 : 1,486.14 = 683.74 : x
  2. Step 2: Convert to fraction form
    1,077.40/1,486.14 = 683.74/x
  3. Step 3: Cross multiply
    1,077.40x = 1,486.14 × 683.74
  4. Step 4: Simplify right side
    1,077.40x = 1,016,133.36
  5. Step 5: Solve for x
    x = 1,016,133.36/1,077.40
  6. Step 6: Final answer
    x = 943.13

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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.