Home / 2,977.76-4,111.08-1,931.78

Finding the Fourth Proportional to 2,977.76, 4,111.08 and 1,931.78

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Solution

The fourth proportional to 2,977.76, 4,111.08 and 1,931.78 is: 2,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,977.76 : 4,111.08 = 1,931.78 : x
  2. Step 2: Convert to fraction form
    2,977.76/4,111.08 = 1,931.78/x
  3. Step 3: Cross multiply
    2,977.76x = 4,111.08 × 1,931.78
  4. Step 4: Simplify right side
    2,977.76x = 7,941,702.12
  5. Step 5: Solve for x
    x = 7,941,702.12/2,977.76
  6. Step 6: Final answer
    x = 2,667.01

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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.