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Finding the Fourth Proportional to 434.01, 651.15 and 388.07

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Solution

The fourth proportional to 434.01, 651.15 and 388.07 is: 582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.01 : 651.15 = 388.07 : x
  2. Step 2: Convert to fraction form
    434.01/651.15 = 388.07/x
  3. Step 3: Cross multiply
    434.01x = 651.15 × 388.07
  4. Step 4: Simplify right side
    434.01x = 252,686.58
  5. Step 5: Solve for x
    x = 252,686.58/434.01
  6. Step 6: Final answer
    x = 582.21

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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.