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Finding the Fourth Proportional to 427,602.71, 640,728.86 and 347,249.64

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Solution

The fourth proportional to 427,602.71, 640,728.86 and 347,249.64 is: 520,326.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,602.71 : 640,728.86 = 347,249.64 : x
  2. Step 2: Convert to fraction form
    427,602.71/640,728.86 = 347,249.64/x
  3. Step 3: Cross multiply
    427,602.71x = 640,728.86 × 347,249.64
  4. Step 4: Simplify right side
    427,602.71x = 222,492,864,236.36
  5. Step 5: Solve for x
    x = 222,492,864,236.36/427,602.71
  6. Step 6: Final answer
    x = 520,326.14

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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.