Home / 1,945.96-2,919.12-647.56

Finding the Fourth Proportional to 1,945.96, 2,919.12 and 647.56

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Solution

The fourth proportional to 1,945.96, 2,919.12 and 647.56 is: 971.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.96 : 2,919.12 = 647.56 : x
  2. Step 2: Convert to fraction form
    1,945.96/2,919.12 = 647.56/x
  3. Step 3: Cross multiply
    1,945.96x = 2,919.12 × 647.56
  4. Step 4: Simplify right side
    1,945.96x = 1,890,305.35
  5. Step 5: Solve for x
    x = 1,890,305.35/1,945.96
  6. Step 6: Final answer
    x = 971.40

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1.5x scale

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.