Home / 2,931.75-4,046.30-1,690.47

Finding the Fourth Proportional to 2,931.75, 4,046.30 and 1,690.47

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Solution

The fourth proportional to 2,931.75, 4,046.30 and 1,690.47 is: 2,333.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.75 : 4,046.30 = 1,690.47 : x
  2. Step 2: Convert to fraction form
    2,931.75/4,046.30 = 1,690.47/x
  3. Step 3: Cross multiply
    2,931.75x = 4,046.30 × 1,690.47
  4. Step 4: Simplify right side
    2,931.75x = 6,840,140.31
  5. Step 5: Solve for x
    x = 6,840,140.31/2,931.75
  6. Step 6: Final answer
    x = 2,333.13

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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.