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Finding the Fourth Proportional to 572.37, 858.20 and 486.30

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Solution

The fourth proportional to 572.37, 858.20 and 486.30 is: 729.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.37 : 858.20 = 486.30 : x
  2. Step 2: Convert to fraction form
    572.37/858.20 = 486.30/x
  3. Step 3: Cross multiply
    572.37x = 858.20 × 486.30
  4. Step 4: Simplify right side
    572.37x = 417,343.45
  5. Step 5: Solve for x
    x = 417,343.45/572.37
  6. Step 6: Final answer
    x = 729.15

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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.