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Finding the Fourth Proportional to 298,872,879.20, 448,309,318.80 and 145,817,871.20

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Solution

The fourth proportional to 298,872,879.20, 448,309,318.80 and 145,817,871.20 is: 218,726,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,872,879.20 : 448,309,318.80 = 145,817,871.20 : x
  2. Step 2: Convert to fraction form
    298,872,879.20/448,309,318.80 = 145,817,871.20/x
  3. Step 3: Cross multiply
    298,872,879.20x = 448,309,318.80 × 145,817,871.20
  4. Step 4: Simplify right side
    298,872,879.20x = 65,371,510,506,538,136
  5. Step 5: Solve for x
    x = 65,371,510,506,538,136/298,872,879.20
  6. Step 6: Final answer
    x = 218,726,806.80

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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.