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Finding the Fourth Proportional to 2,387.86, 3,295.18 and 1,393.07

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Solution

The fourth proportional to 2,387.86, 3,295.18 and 1,393.07 is: 1,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387.86 : 3,295.18 = 1,393.07 : x
  2. Step 2: Convert to fraction form
    2,387.86/3,295.18 = 1,393.07/x
  3. Step 3: Cross multiply
    2,387.86x = 3,295.18 × 1,393.07
  4. Step 4: Simplify right side
    2,387.86x = 4,590,416.40
  5. Step 5: Solve for x
    x = 4,590,416.40/2,387.86
  6. Step 6: Final answer
    x = 1,922.40

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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.