Home / 718,790.40-991,918.44-396,531.36

Finding the Fourth Proportional to 718,790.40, 991,918.44 and 396,531.36

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Solution

The fourth proportional to 718,790.40, 991,918.44 and 396,531.36 is: 547,206.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,790.40 : 991,918.44 = 396,531.36 : x
  2. Step 2: Convert to fraction form
    718,790.40/991,918.44 = 396,531.36/x
  3. Step 3: Cross multiply
    718,790.40x = 991,918.44 × 396,531.36
  4. Step 4: Simplify right side
    718,790.40x = 393,326,768,022.28
  5. Step 5: Solve for x
    x = 393,326,768,022.28/718,790.40
  6. Step 6: Final answer
    x = 547,206.48

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1.5x scale

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.