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Finding the Fourth Proportional to 407.52, 607.36 and 395.68

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Solution

The fourth proportional to 407.52, 607.36 and 395.68 is: 589.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.52 : 607.36 = 395.68 : x
  2. Step 2: Convert to fraction form
    407.52/607.36 = 395.68/x
  3. Step 3: Cross multiply
    407.52x = 607.36 × 395.68
  4. Step 4: Simplify right side
    407.52x = 240,320.20
  5. Step 5: Solve for x
    x = 240,320.20/407.52
  6. Step 6: Final answer
    x = 589.71

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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.