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Finding the Fourth Proportional to 499,252.20, 748,878.30 and 420,228.60

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Solution

The fourth proportional to 499,252.20, 748,878.30 and 420,228.60 is: 630,342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,252.20 : 748,878.30 = 420,228.60 : x
  2. Step 2: Convert to fraction form
    499,252.20/748,878.30 = 420,228.60/x
  3. Step 3: Cross multiply
    499,252.20x = 748,878.30 × 420,228.60
  4. Step 4: Simplify right side
    499,252.20x = 314,700,079,579.38
  5. Step 5: Solve for x
    x = 314,700,079,579.38/499,252.20
  6. Step 6: Final answer
    x = 630,342.90

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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.