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Finding the Fourth Proportional to 472,393,398.80, 708,590,098.20 and 213,617,061.20

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Solution

The fourth proportional to 472,393,398.80, 708,590,098.20 and 213,617,061.20 is: 320,425,591.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,393,398.80 : 708,590,098.20 = 213,617,061.20 : x
  2. Step 2: Convert to fraction form
    472,393,398.80/708,590,098.20 = 213,617,061.20/x
  3. Step 3: Cross multiply
    472,393,398.80x = 708,590,098.20 × 213,617,061.20
  4. Step 4: Simplify right side
    472,393,398.80x = 151,366,934,372,903,424
  5. Step 5: Solve for x
    x = 151,366,934,372,903,424/472,393,398.80
  6. Step 6: Final answer
    x = 320,425,591.80

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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.