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Finding the Fourth Proportional to 1,888.96, 2,828.40 and 1,521.76

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Solution

The fourth proportional to 1,888.96, 2,828.40 and 1,521.76 is: 2,278.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,888.96 : 2,828.40 = 1,521.76 : x
  2. Step 2: Convert to fraction form
    1,888.96/2,828.40 = 1,521.76/x
  3. Step 3: Cross multiply
    1,888.96x = 2,828.40 × 1,521.76
  4. Step 4: Simplify right side
    1,888.96x = 4,304,145.98
  5. Step 5: Solve for x
    x = 4,304,145.98/1,888.96
  6. Step 6: Final answer
    x = 2,278.58

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1.5x scale

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.