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Finding the Fourth Proportional to 1,869.67, 2,803.85 and 553.07

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Solution

The fourth proportional to 1,869.67, 2,803.85 and 553.07 is: 829.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.67 : 2,803.85 = 553.07 : x
  2. Step 2: Convert to fraction form
    1,869.67/2,803.85 = 553.07/x
  3. Step 3: Cross multiply
    1,869.67x = 2,803.85 × 553.07
  4. Step 4: Simplify right side
    1,869.67x = 1,550,725.32
  5. Step 5: Solve for x
    x = 1,550,725.32/1,869.67
  6. Step 6: Final answer
    x = 829.41

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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.