Home / 718,645.41-991,735.38-396,364.23

Finding the Fourth Proportional to 718,645.41, 991,735.38 and 396,364.23

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Solution

The fourth proportional to 718,645.41, 991,735.38 and 396,364.23 is: 546,985.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,645.41 : 991,735.38 = 396,364.23 : x
  2. Step 2: Convert to fraction form
    718,645.41/991,735.38 = 396,364.23/x
  3. Step 3: Cross multiply
    718,645.41x = 991,735.38 × 396,364.23
  4. Step 4: Simplify right side
    718,645.41x = 393,088,430,257.46
  5. Step 5: Solve for x
    x = 393,088,430,257.46/718,645.41
  6. Step 6: Final answer
    x = 546,985.24

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Double scale
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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.