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Finding the Fourth Proportional to 932.50, 1,398.93 and 419.50

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Solution

The fourth proportional to 932.50, 1,398.93 and 419.50 is: 629.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.50 : 1,398.93 = 419.50 : x
  2. Step 2: Convert to fraction form
    932.50/1,398.93 = 419.50/x
  3. Step 3: Cross multiply
    932.50x = 1,398.93 × 419.50
  4. Step 4: Simplify right side
    932.50x = 586,851.14
  5. Step 5: Solve for x
    x = 586,851.14/932.50
  6. Step 6: Final answer
    x = 629.33

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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.