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Finding the Fourth Proportional to 572.99, 857.52 and 399.51

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Solution

The fourth proportional to 572.99, 857.52 and 399.51 is: 597.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.99 : 857.52 = 399.51 : x
  2. Step 2: Convert to fraction form
    572.99/857.52 = 399.51/x
  3. Step 3: Cross multiply
    572.99x = 857.52 × 399.51
  4. Step 4: Simplify right side
    572.99x = 342,587.82
  5. Step 5: Solve for x
    x = 342,587.82/572.99
  6. Step 6: Final answer
    x = 597.90

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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.