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Finding the Fourth Proportional to 3,612.40, 4,985.06 and 1,956.40

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Solution

The fourth proportional to 3,612.40, 4,985.06 and 1,956.40 is: 2,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.40 : 4,985.06 = 1,956.40 : x
  2. Step 2: Convert to fraction form
    3,612.40/4,985.06 = 1,956.40/x
  3. Step 3: Cross multiply
    3,612.40x = 4,985.06 × 1,956.40
  4. Step 4: Simplify right side
    3,612.40x = 9,752,771.38
  5. Step 5: Solve for x
    x = 9,752,771.38/3,612.40
  6. Step 6: Final answer
    x = 2,699.80

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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.