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Finding the Fourth Proportional to 1,045.96, 1,443.36 and 580.21

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Solution

The fourth proportional to 1,045.96, 1,443.36 and 580.21 is: 800.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.96 : 1,443.36 = 580.21 : x
  2. Step 2: Convert to fraction form
    1,045.96/1,443.36 = 580.21/x
  3. Step 3: Cross multiply
    1,045.96x = 1,443.36 × 580.21
  4. Step 4: Simplify right side
    1,045.96x = 837,451.91
  5. Step 5: Solve for x
    x = 837,451.91/1,045.96
  6. Step 6: Final answer
    x = 800.65

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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.