Home / 1,990.18-2,985.45-529.39

Finding the Fourth Proportional to 1,990.18, 2,985.45 and 529.39

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Solution

The fourth proportional to 1,990.18, 2,985.45 and 529.39 is: 794.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.18 : 2,985.45 = 529.39 : x
  2. Step 2: Convert to fraction form
    1,990.18/2,985.45 = 529.39/x
  3. Step 3: Cross multiply
    1,990.18x = 2,985.45 × 529.39
  4. Step 4: Simplify right side
    1,990.18x = 1,580,467.38
  5. Step 5: Solve for x
    x = 1,580,467.38/1,990.18
  6. Step 6: Final answer
    x = 794.13

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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.