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Finding the Fourth Proportional to 1,561.01, 2,154.20 and 897.62

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Solution

The fourth proportional to 1,561.01, 2,154.20 and 897.62 is: 1,238.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.01 : 2,154.20 = 897.62 : x
  2. Step 2: Convert to fraction form
    1,561.01/2,154.20 = 897.62/x
  3. Step 3: Cross multiply
    1,561.01x = 2,154.20 × 897.62
  4. Step 4: Simplify right side
    1,561.01x = 1,933,637.74
  5. Step 5: Solve for x
    x = 1,933,637.74/1,561.01
  6. Step 6: Final answer
    x = 1,238.71

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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.