Home / 1,392.07-2,088.57-742.66

Finding the Fourth Proportional to 1,392.07, 2,088.57 and 742.66

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Solution

The fourth proportional to 1,392.07, 2,088.57 and 742.66 is: 1,114.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.07 : 2,088.57 = 742.66 : x
  2. Step 2: Convert to fraction form
    1,392.07/2,088.57 = 742.66/x
  3. Step 3: Cross multiply
    1,392.07x = 2,088.57 × 742.66
  4. Step 4: Simplify right side
    1,392.07x = 1,551,097.40
  5. Step 5: Solve for x
    x = 1,551,097.40/1,392.07
  6. Step 6: Final answer
    x = 1,114.24

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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.