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Finding the Fourth Proportional to 611,096,800.66, 916,710,798.60 and 261,379,189.06

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Solution

The fourth proportional to 611,096,800.66, 916,710,798.60 and 261,379,189.06 is: 392,096,841.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,096,800.66 : 916,710,798.60 = 261,379,189.06 : x
  2. Step 2: Convert to fraction form
    611,096,800.66/916,710,798.60 = 261,379,189.06/x
  3. Step 3: Cross multiply
    611,096,800.66x = 916,710,798.60 × 261,379,189.06
  4. Step 4: Simplify right side
    611,096,800.66x = 239,609,125,140,612,992
  5. Step 5: Solve for x
    x = 239,609,125,140,612,992/611,096,800.66
  6. Step 6: Final answer
    x = 392,096,841.09

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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.