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Finding the Fourth Proportional to 935.40, 1,290.41 and 603.70

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Solution

The fourth proportional to 935.40, 1,290.41 and 603.70 is: 832.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.40 : 1,290.41 = 603.70 : x
  2. Step 2: Convert to fraction form
    935.40/1,290.41 = 603.70/x
  3. Step 3: Cross multiply
    935.40x = 1,290.41 × 603.70
  4. Step 4: Simplify right side
    935.40x = 779,022.10
  5. Step 5: Solve for x
    x = 779,022.10/935.40
  6. Step 6: Final answer
    x = 832.82

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1.5x scale

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.