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Finding the Fourth Proportional to 933.41, 1,287.95 and 654.50

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Solution

The fourth proportional to 933.41, 1,287.95 and 654.50 is: 903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.41 : 1,287.95 = 654.50 : x
  2. Step 2: Convert to fraction form
    933.41/1,287.95 = 654.50/x
  3. Step 3: Cross multiply
    933.41x = 1,287.95 × 654.50
  4. Step 4: Simplify right side
    933.41x = 842,953.56
  5. Step 5: Solve for x
    x = 842,953.56/933.41
  6. Step 6: Final answer
    x = 903.10

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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.