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Finding the Fourth Proportional to 553,553,999.70, 830,330,999.55 and 225,920,623.20

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Solution

The fourth proportional to 553,553,999.70, 830,330,999.55 and 225,920,623.20 is: 338,880,934.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,553,999.70 : 830,330,999.55 = 225,920,623.20 : x
  2. Step 2: Convert to fraction form
    553,553,999.70/830,330,999.55 = 225,920,623.20/x
  3. Step 3: Cross multiply
    553,553,999.70x = 830,330,999.55 × 225,920,623.20
  4. Step 4: Simplify right side
    553,553,999.70x = 187,588,896,880,614,912
  5. Step 5: Solve for x
    x = 187,588,896,880,614,912/553,553,999.70
  6. Step 6: Final answer
    x = 338,880,934.80

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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.