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Finding the Fourth Proportional to 1,053.64, 1,580.45 and 404.53

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Solution

The fourth proportional to 1,053.64, 1,580.45 and 404.53 is: 606.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.64 : 1,580.45 = 404.53 : x
  2. Step 2: Convert to fraction form
    1,053.64/1,580.45 = 404.53/x
  3. Step 3: Cross multiply
    1,053.64x = 1,580.45 × 404.53
  4. Step 4: Simplify right side
    1,053.64x = 639,339.44
  5. Step 5: Solve for x
    x = 639,339.44/1,053.64
  6. Step 6: Final answer
    x = 606.79

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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.