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Finding the Fourth Proportional to 572.65, 790.53 and 383.92

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Solution

The fourth proportional to 572.65, 790.53 and 383.92 is: 529.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.65 : 790.53 = 383.92 : x
  2. Step 2: Convert to fraction form
    572.65/790.53 = 383.92/x
  3. Step 3: Cross multiply
    572.65x = 790.53 × 383.92
  4. Step 4: Simplify right side
    572.65x = 303,500.28
  5. Step 5: Solve for x
    x = 303,500.28/572.65
  6. Step 6: Final answer
    x = 529.99

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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.