Home / 1,089.61-1,634.36-1,025.40

Finding the Fourth Proportional to 1,089.61, 1,634.36 and 1,025.40

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Solution

The fourth proportional to 1,089.61, 1,634.36 and 1,025.40 is: 1,538.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.61 : 1,634.36 = 1,025.40 : x
  2. Step 2: Convert to fraction form
    1,089.61/1,634.36 = 1,025.40/x
  3. Step 3: Cross multiply
    1,089.61x = 1,634.36 × 1,025.40
  4. Step 4: Simplify right side
    1,089.61x = 1,675,872.74
  5. Step 5: Solve for x
    x = 1,675,872.74/1,089.61
  6. Step 6: Final answer
    x = 1,538.05

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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.