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Finding the Fourth Proportional to 718,293.76, 991,260.39 and 396,017.44

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Solution

The fourth proportional to 718,293.76, 991,260.39 and 396,017.44 is: 546,512.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,293.76 : 991,260.39 = 396,017.44 : x
  2. Step 2: Convert to fraction form
    718,293.76/991,260.39 = 396,017.44/x
  3. Step 3: Cross multiply
    718,293.76x = 991,260.39 × 396,017.44
  4. Step 4: Simplify right side
    718,293.76x = 392,556,402,021.20
  5. Step 5: Solve for x
    x = 392,556,402,021.20/718,293.76
  6. Step 6: Final answer
    x = 546,512.34

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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.