Home / 1,385.02-2,072.67-1,057.78

Finding the Fourth Proportional to 1,385.02, 2,072.67 and 1,057.78

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Solution

The fourth proportional to 1,385.02, 2,072.67 and 1,057.78 is: 1,582.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.02 : 2,072.67 = 1,057.78 : x
  2. Step 2: Convert to fraction form
    1,385.02/2,072.67 = 1,057.78/x
  3. Step 3: Cross multiply
    1,385.02x = 2,072.67 × 1,057.78
  4. Step 4: Simplify right side
    1,385.02x = 2,192,428.87
  5. Step 5: Solve for x
    x = 2,192,428.87/1,385.02
  6. Step 6: Final answer
    x = 1,582.96

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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.