Home / 642,038,512.80-963,057,769.20-420,108,751.20

Finding the Fourth Proportional to 642,038,512.80, 963,057,769.20 and 420,108,751.20

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Solution

The fourth proportional to 642,038,512.80, 963,057,769.20 and 420,108,751.20 is: 630,163,126.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,038,512.80 : 963,057,769.20 = 420,108,751.20 : x
  2. Step 2: Convert to fraction form
    642,038,512.80/963,057,769.20 = 420,108,751.20/x
  3. Step 3: Cross multiply
    642,038,512.80x = 963,057,769.20 × 420,108,751.20
  4. Step 4: Simplify right side
    642,038,512.80x = 404,588,996,752,069,824
  5. Step 5: Solve for x
    x = 404,588,996,752,069,824/642,038,512.80
  6. Step 6: Final answer
    x = 630,163,126.80

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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.