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Finding the Fourth Proportional to 266,779,978.70, 400,169,968.05 and 221,430,346.70

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Solution

The fourth proportional to 266,779,978.70, 400,169,968.05 and 221,430,346.70 is: 332,145,520.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,779,978.70 : 400,169,968.05 = 221,430,346.70 : x
  2. Step 2: Convert to fraction form
    266,779,978.70/400,169,968.05 = 221,430,346.70/x
  3. Step 3: Cross multiply
    266,779,978.70x = 400,169,968.05 × 221,430,346.70
  4. Step 4: Simplify right side
    266,779,978.70x = 88,609,774,764,239,424
  5. Step 5: Solve for x
    x = 88,609,774,764,239,424/266,779,978.70
  6. Step 6: Final answer
    x = 332,145,520.05

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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.