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Finding the Fourth Proportional to 485,401.30, 728,101.95 and 343,683.70

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Solution

The fourth proportional to 485,401.30, 728,101.95 and 343,683.70 is: 515,525.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,401.30 : 728,101.95 = 343,683.70 : x
  2. Step 2: Convert to fraction form
    485,401.30/728,101.95 = 343,683.70/x
  3. Step 3: Cross multiply
    485,401.30x = 728,101.95 × 343,683.70
  4. Step 4: Simplify right side
    485,401.30x = 250,236,772,153.22
  5. Step 5: Solve for x
    x = 250,236,772,153.22/485,401.30
  6. Step 6: Final answer
    x = 515,525.55

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Similar ratio
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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.