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Finding the Fourth Proportional to 384.47, 575.79 and 210.87

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Solution

The fourth proportional to 384.47, 575.79 and 210.87 is: 315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.47 : 575.79 = 210.87 : x
  2. Step 2: Convert to fraction form
    384.47/575.79 = 210.87/x
  3. Step 3: Cross multiply
    384.47x = 575.79 × 210.87
  4. Step 4: Simplify right side
    384.47x = 121,415.78
  5. Step 5: Solve for x
    x = 121,415.78/384.47
  6. Step 6: Final answer
    x = 315.80

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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.