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Finding the Fourth Proportional to 310,969.32, 429,201.90 and 203,339.40

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Solution

The fourth proportional to 310,969.32, 429,201.90 and 203,339.40 is: 280,650.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,969.32 : 429,201.90 = 203,339.40 : x
  2. Step 2: Convert to fraction form
    310,969.32/429,201.90 = 203,339.40/x
  3. Step 3: Cross multiply
    310,969.32x = 429,201.90 × 203,339.40
  4. Step 4: Simplify right side
    310,969.32x = 87,273,656,824.86
  5. Step 5: Solve for x
    x = 87,273,656,824.86/310,969.32
  6. Step 6: Final answer
    x = 280,650.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.