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Finding the Fourth Proportional to 3,314.78, 4,574.12 and 1,917.62

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Solution

The fourth proportional to 3,314.78, 4,574.12 and 1,917.62 is: 2,646.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,314.78 : 4,574.12 = 1,917.62 : x
  2. Step 2: Convert to fraction form
    3,314.78/4,574.12 = 1,917.62/x
  3. Step 3: Cross multiply
    3,314.78x = 4,574.12 × 1,917.62
  4. Step 4: Simplify right side
    3,314.78x = 8,771,423.99
  5. Step 5: Solve for x
    x = 8,771,423.99/3,314.78
  6. Step 6: Final answer
    x = 2,646.16

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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.