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Finding the Fourth Proportional to 1,431.95, 1,976.36 and 935.01

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Solution

The fourth proportional to 1,431.95, 1,976.36 and 935.01 is: 1,290.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.95 : 1,976.36 = 935.01 : x
  2. Step 2: Convert to fraction form
    1,431.95/1,976.36 = 935.01/x
  3. Step 3: Cross multiply
    1,431.95x = 1,976.36 × 935.01
  4. Step 4: Simplify right side
    1,431.95x = 1,847,911.69
  5. Step 5: Solve for x
    x = 1,847,911.69/1,431.95
  6. Step 6: Final answer
    x = 1,290.49

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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.