Home / 420,471,878.40-630,707,817.60-248,143,276.80

Finding the Fourth Proportional to 420,471,878.40, 630,707,817.60 and 248,143,276.80

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Solution

The fourth proportional to 420,471,878.40, 630,707,817.60 and 248,143,276.80 is: 372,214,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,471,878.40 : 630,707,817.60 = 248,143,276.80 : x
  2. Step 2: Convert to fraction form
    420,471,878.40/630,707,817.60 = 248,143,276.80/x
  3. Step 3: Cross multiply
    420,471,878.40x = 630,707,817.60 × 248,143,276.80
  4. Step 4: Simplify right side
    420,471,878.40x = 156,505,904,562,640,736
  5. Step 5: Solve for x
    x = 156,505,904,562,640,736/420,471,878.40
  6. Step 6: Final answer
    x = 372,214,915.20

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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.