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Finding the Fourth Proportional to 1,865.53, 2,798.90 and 633.72

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Solution

The fourth proportional to 1,865.53, 2,798.90 and 633.72 is: 950.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.53 : 2,798.90 = 633.72 : x
  2. Step 2: Convert to fraction form
    1,865.53/2,798.90 = 633.72/x
  3. Step 3: Cross multiply
    1,865.53x = 2,798.90 × 633.72
  4. Step 4: Simplify right side
    1,865.53x = 1,773,715.74
  5. Step 5: Solve for x
    x = 1,773,715.74/1,865.53
  6. Step 6: Final answer
    x = 950.79

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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.