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Finding the Fourth Proportional to 665,915,122.89, 918,964,835.69 and 368,578,016.82

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Solution

The fourth proportional to 665,915,122.89, 918,964,835.69 and 368,578,016.82 is: 508,638,751.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,915,122.89 : 918,964,835.69 = 368,578,016.82 : x
  2. Step 2: Convert to fraction form
    665,915,122.89/918,964,835.69 = 368,578,016.82/x
  3. Step 3: Cross multiply
    665,915,122.89x = 918,964,835.69 × 368,578,016.82
  4. Step 4: Simplify right side
    665,915,122.89x = 338,710,236,664,094,464
  5. Step 5: Solve for x
    x = 338,710,236,664,094,464/665,915,122.89
  6. Step 6: Final answer
    x = 508,638,751.43

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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.