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Finding the Fourth Proportional to 869.19, 1,199.53 and 574.25

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Solution

The fourth proportional to 869.19, 1,199.53 and 574.25 is: 792.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.19 : 1,199.53 = 574.25 : x
  2. Step 2: Convert to fraction form
    869.19/1,199.53 = 574.25/x
  3. Step 3: Cross multiply
    869.19x = 1,199.53 × 574.25
  4. Step 4: Simplify right side
    869.19x = 688,830.10
  5. Step 5: Solve for x
    x = 688,830.10/869.19
  6. Step 6: Final answer
    x = 792.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.