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Finding the Fourth Proportional to 3,612.90, 4,985.76 and 1,956.90

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Solution

The fourth proportional to 3,612.90, 4,985.76 and 1,956.90 is: 2,700.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.90 : 4,985.76 = 1,956.90 : x
  2. Step 2: Convert to fraction form
    3,612.90/4,985.76 = 1,956.90/x
  3. Step 3: Cross multiply
    3,612.90x = 4,985.76 × 1,956.90
  4. Step 4: Simplify right side
    3,612.90x = 9,756,633.74
  5. Step 5: Solve for x
    x = 9,756,633.74/3,612.90
  6. Step 6: Final answer
    x = 2,700.50

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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.