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Finding the Fourth Proportional to 1,867.80, 2,801.76 and 569.40

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Solution

The fourth proportional to 1,867.80, 2,801.76 and 569.40 is: 854.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,867.80 : 2,801.76 = 569.40 : x
  2. Step 2: Convert to fraction form
    1,867.80/2,801.76 = 569.40/x
  3. Step 3: Cross multiply
    1,867.80x = 2,801.76 × 569.40
  4. Step 4: Simplify right side
    1,867.80x = 1,595,322.14
  5. Step 5: Solve for x
    x = 1,595,322.14/1,867.80
  6. Step 6: Final answer
    x = 854.12

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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.