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Finding the Fourth Proportional to 1,053.20, 1,580.50 and 369.20

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Solution

The fourth proportional to 1,053.20, 1,580.50 and 369.20 is: 554.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.20 : 1,580.50 = 369.20 : x
  2. Step 2: Convert to fraction form
    1,053.20/1,580.50 = 369.20/x
  3. Step 3: Cross multiply
    1,053.20x = 1,580.50 × 369.20
  4. Step 4: Simplify right side
    1,053.20x = 583,520.60
  5. Step 5: Solve for x
    x = 583,520.60/1,053.20
  6. Step 6: Final answer
    x = 554.05

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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.