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Finding the Fourth Proportional to 485,117.80, 727,676.70 and 343,400.20

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Solution

The fourth proportional to 485,117.80, 727,676.70 and 343,400.20 is: 515,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,117.80 : 727,676.70 = 343,400.20 : x
  2. Step 2: Convert to fraction form
    485,117.80/727,676.70 = 343,400.20/x
  3. Step 3: Cross multiply
    485,117.80x = 727,676.70 × 343,400.20
  4. Step 4: Simplify right side
    485,117.80x = 249,884,324,315.34
  5. Step 5: Solve for x
    x = 249,884,324,315.34/485,117.80
  6. Step 6: Final answer
    x = 515,100.30

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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.