Home / 1,990.49-2,985.53-529.79

Finding the Fourth Proportional to 1,990.49, 2,985.53 and 529.79

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Solution

The fourth proportional to 1,990.49, 2,985.53 and 529.79 is: 794.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.49 : 2,985.53 = 529.79 : x
  2. Step 2: Convert to fraction form
    1,990.49/2,985.53 = 529.79/x
  3. Step 3: Cross multiply
    1,990.49x = 2,985.53 × 529.79
  4. Step 4: Simplify right side
    1,990.49x = 1,581,686.36
  5. Step 5: Solve for x
    x = 1,581,686.36/1,990.49
  6. Step 6: Final answer
    x = 794.62

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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.