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Finding the Fourth Proportional to 3,074.79, 4,242.78 and 1,748.23

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Solution

The fourth proportional to 3,074.79, 4,242.78 and 1,748.23 is: 2,412.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,074.79 : 4,242.78 = 1,748.23 : x
  2. Step 2: Convert to fraction form
    3,074.79/4,242.78 = 1,748.23/x
  3. Step 3: Cross multiply
    3,074.79x = 4,242.78 × 1,748.23
  4. Step 4: Simplify right side
    3,074.79x = 7,417,368.54
  5. Step 5: Solve for x
    x = 7,417,368.54/3,074.79
  6. Step 6: Final answer
    x = 2,412.32

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Half scale
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Double scale
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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.