Home / 1,620.52-2,235.80-921.76

Finding the Fourth Proportional to 1,620.52, 2,235.80 and 921.76

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Solution

The fourth proportional to 1,620.52, 2,235.80 and 921.76 is: 1,271.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.52 : 2,235.80 = 921.76 : x
  2. Step 2: Convert to fraction form
    1,620.52/2,235.80 = 921.76/x
  3. Step 3: Cross multiply
    1,620.52x = 2,235.80 × 921.76
  4. Step 4: Simplify right side
    1,620.52x = 2,060,871.01
  5. Step 5: Solve for x
    x = 2,060,871.01/1,620.52
  6. Step 6: Final answer
    x = 1,271.73

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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.