Home / 1,945.56-2,918.76-647.16

Finding the Fourth Proportional to 1,945.56, 2,918.76 and 647.16

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Solution

The fourth proportional to 1,945.56, 2,918.76 and 647.16 is: 970.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.56 : 2,918.76 = 647.16 : x
  2. Step 2: Convert to fraction form
    1,945.56/2,918.76 = 647.16/x
  3. Step 3: Cross multiply
    1,945.56x = 2,918.76 × 647.16
  4. Step 4: Simplify right side
    1,945.56x = 1,888,904.72
  5. Step 5: Solve for x
    x = 1,888,904.72/1,945.56
  6. Step 6: Final answer
    x = 970.88

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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.