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Finding the Fourth Proportional to 420,630.20, 630,714.90 and 171,030.20

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Solution

The fourth proportional to 420,630.20, 630,714.90 and 171,030.20 is: 256,451.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,630.20 : 630,714.90 = 171,030.20 : x
  2. Step 2: Convert to fraction form
    420,630.20/630,714.90 = 171,030.20/x
  3. Step 3: Cross multiply
    420,630.20x = 630,714.90 × 171,030.20
  4. Step 4: Simplify right side
    420,630.20x = 107,871,295,489.98
  5. Step 5: Solve for x
    x = 107,871,295,489.98/420,630.20
  6. Step 6: Final answer
    x = 256,451.62

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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.