Home / 1,931.85-2,668.14-1,778.76

Finding the Fourth Proportional to 1,931.85, 2,668.14 and 1,778.76

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Solution

The fourth proportional to 1,931.85, 2,668.14 and 1,778.76 is: 2,456.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931.85 : 2,668.14 = 1,778.76 : x
  2. Step 2: Convert to fraction form
    1,931.85/2,668.14 = 1,778.76/x
  3. Step 3: Cross multiply
    1,931.85x = 2,668.14 × 1,778.76
  4. Step 4: Simplify right side
    1,931.85x = 4,745,980.71
  5. Step 5: Solve for x
    x = 4,745,980.71/1,931.85
  6. Step 6: Final answer
    x = 2,456.70

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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.