Home / 1,947.10-2,920.64-631.95

Finding the Fourth Proportional to 1,947.10, 2,920.64 and 631.95

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Solution

The fourth proportional to 1,947.10, 2,920.64 and 631.95 is: 947.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.10 : 2,920.64 = 631.95 : x
  2. Step 2: Convert to fraction form
    1,947.10/2,920.64 = 631.95/x
  3. Step 3: Cross multiply
    1,947.10x = 2,920.64 × 631.95
  4. Step 4: Simplify right side
    1,947.10x = 1,845,698.45
  5. Step 5: Solve for x
    x = 1,845,698.45/1,947.10
  6. Step 6: Final answer
    x = 947.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.