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Finding the Fourth Proportional to 666,628,765.05, 920,266,696.84 and 443,980,967.61

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Solution

The fourth proportional to 666,628,765.05, 920,266,696.84 and 443,980,967.61 is: 612,906,192.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,628,765.05 : 920,266,696.84 = 443,980,967.61 : x
  2. Step 2: Convert to fraction form
    666,628,765.05/920,266,696.84 = 443,980,967.61/x
  3. Step 3: Cross multiply
    666,628,765.05x = 920,266,696.84 × 443,980,967.61
  4. Step 4: Simplify right side
    666,628,765.05x = 408,580,898,522,281,728
  5. Step 5: Solve for x
    x = 408,580,898,522,281,728/666,628,765.05
  6. Step 6: Final answer
    x = 612,906,192.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.