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Finding the Fourth Proportional to 570.54, 853.80 and 423.99

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Solution

The fourth proportional to 570.54, 853.80 and 423.99 is: 634.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.54 : 853.80 = 423.99 : x
  2. Step 2: Convert to fraction form
    570.54/853.80 = 423.99/x
  3. Step 3: Cross multiply
    570.54x = 853.80 × 423.99
  4. Step 4: Simplify right side
    570.54x = 362,002.66
  5. Step 5: Solve for x
    x = 362,002.66/570.54
  6. Step 6: Final answer
    x = 634.49

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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.