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Finding the Fourth Proportional to 581.50, 800.71 and 498.41

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Solution

The fourth proportional to 581.50, 800.71 and 498.41 is: 686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.50 : 800.71 = 498.41 : x
  2. Step 2: Convert to fraction form
    581.50/800.71 = 498.41/x
  3. Step 3: Cross multiply
    581.50x = 800.71 × 498.41
  4. Step 4: Simplify right side
    581.50x = 399,081.87
  5. Step 5: Solve for x
    x = 399,081.87/581.50
  6. Step 6: Final answer
    x = 686.30

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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.