Home / 1,605.20-2,215.15-897.06

Finding the Fourth Proportional to 1,605.20, 2,215.15 and 897.06

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Solution

The fourth proportional to 1,605.20, 2,215.15 and 897.06 is: 1,237.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.20 : 2,215.15 = 897.06 : x
  2. Step 2: Convert to fraction form
    1,605.20/2,215.15 = 897.06/x
  3. Step 3: Cross multiply
    1,605.20x = 2,215.15 × 897.06
  4. Step 4: Simplify right side
    1,605.20x = 1,987,122.46
  5. Step 5: Solve for x
    x = 1,987,122.46/1,605.20
  6. Step 6: Final answer
    x = 1,237.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.