Home / 1,607.40-2,415.84-1,089.12

Finding the Fourth Proportional to 1,607.40, 2,415.84 and 1,089.12

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Solution

The fourth proportional to 1,607.40, 2,415.84 and 1,089.12 is: 1,636.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,607.40 : 2,415.84 = 1,089.12 : x
  2. Step 2: Convert to fraction form
    1,607.40/2,415.84 = 1,089.12/x
  3. Step 3: Cross multiply
    1,607.40x = 2,415.84 × 1,089.12
  4. Step 4: Simplify right side
    1,607.40x = 2,631,139.66
  5. Step 5: Solve for x
    x = 2,631,139.66/1,607.40
  6. Step 6: Final answer
    x = 1,636.89

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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.