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Finding the Fourth Proportional to 343,818.60, 515,727.90 and 307,660.20

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Solution

The fourth proportional to 343,818.60, 515,727.90 and 307,660.20 is: 461,490.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,818.60 : 515,727.90 = 307,660.20 : x
  2. Step 2: Convert to fraction form
    343,818.60/515,727.90 = 307,660.20/x
  3. Step 3: Cross multiply
    343,818.60x = 515,727.90 × 307,660.20
  4. Step 4: Simplify right side
    343,818.60x = 158,668,948,859.58
  5. Step 5: Solve for x
    x = 158,668,948,859.58/343,818.60
  6. Step 6: Final answer
    x = 461,490.30

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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.