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Finding the Fourth Proportional to 1,406.42, 1,941.66 and 934.18

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Solution

The fourth proportional to 1,406.42, 1,941.66 and 934.18 is: 1,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.42 : 1,941.66 = 934.18 : x
  2. Step 2: Convert to fraction form
    1,406.42/1,941.66 = 934.18/x
  3. Step 3: Cross multiply
    1,406.42x = 1,941.66 × 934.18
  4. Step 4: Simplify right side
    1,406.42x = 1,813,859.94
  5. Step 5: Solve for x
    x = 1,813,859.94/1,406.42
  6. Step 6: Final answer
    x = 1,289.70

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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.