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Finding the Fourth Proportional to 1,575.61, 2,174.15 and 912.37

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Solution

The fourth proportional to 1,575.61, 2,174.15 and 912.37 is: 1,258.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.61 : 2,174.15 = 912.37 : x
  2. Step 2: Convert to fraction form
    1,575.61/2,174.15 = 912.37/x
  3. Step 3: Cross multiply
    1,575.61x = 2,174.15 × 912.37
  4. Step 4: Simplify right side
    1,575.61x = 1,983,637.56
  5. Step 5: Solve for x
    x = 1,983,637.56/1,575.61
  6. Step 6: Final answer
    x = 1,258.96

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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.