Home / 2,715.40-4,066.70-1,678.60

Finding the Fourth Proportional to 2,715.40, 4,066.70 and 1,678.60

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Solution

The fourth proportional to 2,715.40, 4,066.70 and 1,678.60 is: 2,513.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.40 : 4,066.70 = 1,678.60 : x
  2. Step 2: Convert to fraction form
    2,715.40/4,066.70 = 1,678.60/x
  3. Step 3: Cross multiply
    2,715.40x = 4,066.70 × 1,678.60
  4. Step 4: Simplify right side
    2,715.40x = 6,826,362.62
  5. Step 5: Solve for x
    x = 6,826,362.62/2,715.40
  6. Step 6: Final answer
    x = 2,513.94

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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.