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Finding the Fourth Proportional to 2,393.40, 3,310.38 and 2,117.40

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Solution

The fourth proportional to 2,393.40, 3,310.38 and 2,117.40 is: 2,928.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,393.40 : 3,310.38 = 2,117.40 : x
  2. Step 2: Convert to fraction form
    2,393.40/3,310.38 = 2,117.40/x
  3. Step 3: Cross multiply
    2,393.40x = 3,310.38 × 2,117.40
  4. Step 4: Simplify right side
    2,393.40x = 7,009,398.61
  5. Step 5: Solve for x
    x = 7,009,398.61/2,393.40
  6. Step 6: Final answer
    x = 2,928.64

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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.