Home / 2,678.59-4,017.27-947.21

Finding the Fourth Proportional to 2,678.59, 4,017.27 and 947.21

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Solution

The fourth proportional to 2,678.59, 4,017.27 and 947.21 is: 1,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.59 : 4,017.27 = 947.21 : x
  2. Step 2: Convert to fraction form
    2,678.59/4,017.27 = 947.21/x
  3. Step 3: Cross multiply
    2,678.59x = 4,017.27 × 947.21
  4. Step 4: Simplify right side
    2,678.59x = 3,805,198.32
  5. Step 5: Solve for x
    x = 3,805,198.32/2,678.59
  6. Step 6: Final answer
    x = 1,420.60

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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.