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Finding the Fourth Proportional to 1,393.07, 2,088.61 and 699.23

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Solution

The fourth proportional to 1,393.07, 2,088.61 and 699.23 is: 1,048.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393.07 : 2,088.61 = 699.23 : x
  2. Step 2: Convert to fraction form
    1,393.07/2,088.61 = 699.23/x
  3. Step 3: Cross multiply
    1,393.07x = 2,088.61 × 699.23
  4. Step 4: Simplify right side
    1,393.07x = 1,460,418.77
  5. Step 5: Solve for x
    x = 1,460,418.77/1,393.07
  6. Step 6: Final answer
    x = 1,048.35

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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.