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Finding the Fourth Proportional to 647,892,014.40, 971,923,269.60 and 239,235,220.80

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Solution

The fourth proportional to 647,892,014.40, 971,923,269.60 and 239,235,220.80 is: 358,884,309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,892,014.40 : 971,923,269.60 = 239,235,220.80 : x
  2. Step 2: Convert to fraction form
    647,892,014.40/971,923,269.60 = 239,235,220.80/x
  3. Step 3: Cross multiply
    647,892,014.40x = 971,923,269.60 × 239,235,220.80
  4. Step 4: Simplify right side
    647,892,014.40x = 232,518,278,003,413,952
  5. Step 5: Solve for x
    x = 232,518,278,003,413,952/647,892,014.40
  6. Step 6: Final answer
    x = 358,884,309.17

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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.