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Finding the Fourth Proportional to 935.11, 1,290.18 and 603.40

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Solution

The fourth proportional to 935.11, 1,290.18 and 603.40 is: 832.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.11 : 1,290.18 = 603.40 : x
  2. Step 2: Convert to fraction form
    935.11/1,290.18 = 603.40/x
  3. Step 3: Cross multiply
    935.11x = 1,290.18 × 603.40
  4. Step 4: Simplify right side
    935.11x = 778,494.61
  5. Step 5: Solve for x
    x = 778,494.61/935.11
  6. Step 6: Final answer
    x = 832.52

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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.