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Finding the Fourth Proportional to 1,052.59, 1,578.90 and 436.15

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Solution

The fourth proportional to 1,052.59, 1,578.90 and 436.15 is: 654.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.59 : 1,578.90 = 436.15 : x
  2. Step 2: Convert to fraction form
    1,052.59/1,578.90 = 436.15/x
  3. Step 3: Cross multiply
    1,052.59x = 1,578.90 × 436.15
  4. Step 4: Simplify right side
    1,052.59x = 688,629.34
  5. Step 5: Solve for x
    x = 688,629.34/1,052.59
  6. Step 6: Final answer
    x = 654.22

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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.