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Finding the Fourth Proportional to 427,207.64, 640,680.21 and 202,501.58

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Solution

The fourth proportional to 427,207.64, 640,680.21 and 202,501.58 is: 303,690.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,207.64 : 640,680.21 = 202,501.58 : x
  2. Step 2: Convert to fraction form
    427,207.64/640,680.21 = 202,501.58/x
  3. Step 3: Cross multiply
    427,207.64x = 640,680.21 × 202,501.58
  4. Step 4: Simplify right side
    427,207.64x = 129,738,751,596.33
  5. Step 5: Solve for x
    x = 129,738,751,596.33/427,207.64
  6. Step 6: Final answer
    x = 303,690.15

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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.