Home / 1,990.62-2,985.95-529.76

Finding the Fourth Proportional to 1,990.62, 2,985.95 and 529.76

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Solution

The fourth proportional to 1,990.62, 2,985.95 and 529.76 is: 794.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.62 : 2,985.95 = 529.76 : x
  2. Step 2: Convert to fraction form
    1,990.62/2,985.95 = 529.76/x
  3. Step 3: Cross multiply
    1,990.62x = 2,985.95 × 529.76
  4. Step 4: Simplify right side
    1,990.62x = 1,581,836.87
  5. Step 5: Solve for x
    x = 1,581,836.87/1,990.62
  6. Step 6: Final answer
    x = 794.65

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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.