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Finding the Fourth Proportional to 572.45, 790.07 and 479.05

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Solution

The fourth proportional to 572.45, 790.07 and 479.05 is: 661.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.45 : 790.07 = 479.05 : x
  2. Step 2: Convert to fraction form
    572.45/790.07 = 479.05/x
  3. Step 3: Cross multiply
    572.45x = 790.07 × 479.05
  4. Step 4: Simplify right side
    572.45x = 378,478.66
  5. Step 5: Solve for x
    x = 378,478.66/572.45
  6. Step 6: Final answer
    x = 661.16

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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.