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Finding the Fourth Proportional to 1,400.20, 1,933.57 and 903.69

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Solution

The fourth proportional to 1,400.20, 1,933.57 and 903.69 is: 1,247.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.20 : 1,933.57 = 903.69 : x
  2. Step 2: Convert to fraction form
    1,400.20/1,933.57 = 903.69/x
  3. Step 3: Cross multiply
    1,400.20x = 1,933.57 × 903.69
  4. Step 4: Simplify right side
    1,400.20x = 1,747,347.87
  5. Step 5: Solve for x
    x = 1,747,347.87/1,400.20
  6. Step 6: Final answer
    x = 1,247.93

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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.