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Finding the Fourth Proportional to 581.85, 803.03 and 404.78

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Solution

The fourth proportional to 581.85, 803.03 and 404.78 is: 558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.85 : 803.03 = 404.78 : x
  2. Step 2: Convert to fraction form
    581.85/803.03 = 404.78/x
  3. Step 3: Cross multiply
    581.85x = 803.03 × 404.78
  4. Step 4: Simplify right side
    581.85x = 325,044.44
  5. Step 5: Solve for x
    x = 325,044.44/581.85
  6. Step 6: Final answer
    x = 558.64

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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.