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Finding the Fourth Proportional to 661.68, 912.50 and 412.83

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Solution

The fourth proportional to 661.68, 912.50 and 412.83 is: 569.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.68 : 912.50 = 412.83 : x
  2. Step 2: Convert to fraction form
    661.68/912.50 = 412.83/x
  3. Step 3: Cross multiply
    661.68x = 912.50 × 412.83
  4. Step 4: Simplify right side
    661.68x = 376,712.45
  5. Step 5: Solve for x
    x = 376,712.45/661.68
  6. Step 6: Final answer
    x = 569.33

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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.