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Finding the Fourth Proportional to 572.96, 790.08 and 407

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Solution

The fourth proportional to 572.96, 790.08 and 407 is: 561.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.96 : 790.08 = 407 : x
  2. Step 2: Convert to fraction form
    572.96/790.08 = 407/x
  3. Step 3: Cross multiply
    572.96x = 790.08 × 407
  4. Step 4: Simplify right side
    572.96x = 321,562.56
  5. Step 5: Solve for x
    x = 321,562.56/572.96
  6. Step 6: Final answer
    x = 561.23

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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.