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Finding the Fourth Proportional to 935.13, 1,290.06 and 619.95

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Solution

The fourth proportional to 935.13, 1,290.06 and 619.95 is: 855.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.13 : 1,290.06 = 619.95 : x
  2. Step 2: Convert to fraction form
    935.13/1,290.06 = 619.95/x
  3. Step 3: Cross multiply
    935.13x = 1,290.06 × 619.95
  4. Step 4: Simplify right side
    935.13x = 799,772.70
  5. Step 5: Solve for x
    x = 799,772.70/935.13
  6. Step 6: Final answer
    x = 855.25

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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.