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Finding the Fourth Proportional to 343,934.40, 515,901.60 and 217,963.20

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Solution

The fourth proportional to 343,934.40, 515,901.60 and 217,963.20 is: 326,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,934.40 : 515,901.60 = 217,963.20 : x
  2. Step 2: Convert to fraction form
    343,934.40/515,901.60 = 217,963.20/x
  3. Step 3: Cross multiply
    343,934.40x = 515,901.60 × 217,963.20
  4. Step 4: Simplify right side
    343,934.40x = 112,447,563,621.12
  5. Step 5: Solve for x
    x = 112,447,563,621.12/343,934.40
  6. Step 6: Final answer
    x = 326,944.80

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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.