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Finding the Fourth Proportional to 935.73, 1,291.50 and 621.02

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Solution

The fourth proportional to 935.73, 1,291.50 and 621.02 is: 857.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.73 : 1,291.50 = 621.02 : x
  2. Step 2: Convert to fraction form
    935.73/1,291.50 = 621.02/x
  3. Step 3: Cross multiply
    935.73x = 1,291.50 × 621.02
  4. Step 4: Simplify right side
    935.73x = 802,040.87
  5. Step 5: Solve for x
    x = 802,040.87/935.73
  6. Step 6: Final answer
    x = 857.13

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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.