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Finding the Fourth Proportional to 1,393.93, 2,088.46 and 744.31

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Solution

The fourth proportional to 1,393.93, 2,088.46 and 744.31 is: 1,115.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.93 : 2,088.46 = 744.31 : x
  2. Step 2: Convert to fraction form
    1,393.93/2,088.46 = 744.31/x
  3. Step 3: Cross multiply
    1,393.93x = 2,088.46 × 744.31
  4. Step 4: Simplify right side
    1,393.93x = 1,554,461.66
  5. Step 5: Solve for x
    x = 1,554,461.66/1,393.93
  6. Step 6: Final answer
    x = 1,115.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.