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Finding the Fourth Proportional to 343,881.40, 515,822.10 and 217,910.20

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Solution

The fourth proportional to 343,881.40, 515,822.10 and 217,910.20 is: 326,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,881.40 : 515,822.10 = 217,910.20 : x
  2. Step 2: Convert to fraction form
    343,881.40/515,822.10 = 217,910.20/x
  3. Step 3: Cross multiply
    343,881.40x = 515,822.10 × 217,910.20
  4. Step 4: Simplify right side
    343,881.40x = 112,402,896,975.42
  5. Step 5: Solve for x
    x = 112,402,896,975.42/343,881.40
  6. Step 6: Final answer
    x = 326,865.30

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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.