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Finding the Fourth Proportional to 388.58, 579.50 and 357.08

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Solution

The fourth proportional to 388.58, 579.50 and 357.08 is: 532.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.58 : 579.50 = 357.08 : x
  2. Step 2: Convert to fraction form
    388.58/579.50 = 357.08/x
  3. Step 3: Cross multiply
    388.58x = 579.50 × 357.08
  4. Step 4: Simplify right side
    388.58x = 206,927.86
  5. Step 5: Solve for x
    x = 206,927.86/388.58
  6. Step 6: Final answer
    x = 532.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.