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Finding the Fourth Proportional to 665,892,977.76, 918,925,540.56 and 368,535,797.28

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Solution

The fourth proportional to 665,892,977.76, 918,925,540.56 and 368,535,797.28 is: 508,575,654.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,892,977.76 : 918,925,540.56 = 368,535,797.28 : x
  2. Step 2: Convert to fraction form
    665,892,977.76/918,925,540.56 = 368,535,797.28/x
  3. Step 3: Cross multiply
    665,892,977.76x = 918,925,540.56 × 368,535,797.28
  4. Step 4: Simplify right side
    665,892,977.76x = 338,656,956,731,234,560
  5. Step 5: Solve for x
    x = 338,656,956,731,234,560/665,892,977.76
  6. Step 6: Final answer
    x = 508,575,654.11

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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.