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Finding the Fourth Proportional to 664.83, 917.51 and 384.98

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Solution

The fourth proportional to 664.83, 917.51 and 384.98 is: 531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.83 : 917.51 = 384.98 : x
  2. Step 2: Convert to fraction form
    664.83/917.51 = 384.98/x
  3. Step 3: Cross multiply
    664.83x = 917.51 × 384.98
  4. Step 4: Simplify right side
    664.83x = 353,216.49
  5. Step 5: Solve for x
    x = 353,216.49/664.83
  6. Step 6: Final answer
    x = 531.29

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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.