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Finding the Fourth Proportional to 2,981.64, 4,115.15 and 1,655.77

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Solution

The fourth proportional to 2,981.64, 4,115.15 and 1,655.77 is: 2,285.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.64 : 4,115.15 = 1,655.77 : x
  2. Step 2: Convert to fraction form
    2,981.64/4,115.15 = 1,655.77/x
  3. Step 3: Cross multiply
    2,981.64x = 4,115.15 × 1,655.77
  4. Step 4: Simplify right side
    2,981.64x = 6,813,741.92
  5. Step 5: Solve for x
    x = 6,813,741.92/2,981.64
  6. Step 6: Final answer
    x = 2,285.23

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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.