Home / 1,945.44-2,918.40-647.36

Finding the Fourth Proportional to 1,945.44, 2,918.40 and 647.36

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Solution

The fourth proportional to 1,945.44, 2,918.40 and 647.36 is: 971.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.44 : 2,918.40 = 647.36 : x
  2. Step 2: Convert to fraction form
    1,945.44/2,918.40 = 647.36/x
  3. Step 3: Cross multiply
    1,945.44x = 2,918.40 × 647.36
  4. Step 4: Simplify right side
    1,945.44x = 1,889,255.42
  5. Step 5: Solve for x
    x = 1,889,255.42/1,945.44
  6. Step 6: Final answer
    x = 971.12

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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.