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Finding the Fourth Proportional to 574.40, 859.72 and 436.70

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Solution

The fourth proportional to 574.40, 859.72 and 436.70 is: 653.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.40 : 859.72 = 436.70 : x
  2. Step 2: Convert to fraction form
    574.40/859.72 = 436.70/x
  3. Step 3: Cross multiply
    574.40x = 859.72 × 436.70
  4. Step 4: Simplify right side
    574.40x = 375,439.72
  5. Step 5: Solve for x
    x = 375,439.72/574.40
  6. Step 6: Final answer
    x = 653.62

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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.