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Finding the Fourth Proportional to 239,169,978.40, 358,754,967.60 and 218,006,816.80

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Solution

The fourth proportional to 239,169,978.40, 358,754,967.60 and 218,006,816.80 is: 327,010,225.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,169,978.40 : 358,754,967.60 = 218,006,816.80 : x
  2. Step 2: Convert to fraction form
    239,169,978.40/358,754,967.60 = 218,006,816.80/x
  3. Step 3: Cross multiply
    239,169,978.40x = 358,754,967.60 × 218,006,816.80
  4. Step 4: Simplify right side
    239,169,978.40x = 78,211,028,497,663,152
  5. Step 5: Solve for x
    x = 78,211,028,497,663,152/239,169,978.40
  6. Step 6: Final answer
    x = 327,010,225.20

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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.