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Finding the Fourth Proportional to 368,782,912.80, 553,174,369.20 and 287,153,575.20

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Solution

The fourth proportional to 368,782,912.80, 553,174,369.20 and 287,153,575.20 is: 430,730,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,782,912.80 : 553,174,369.20 = 287,153,575.20 : x
  2. Step 2: Convert to fraction form
    368,782,912.80/553,174,369.20 = 287,153,575.20/x
  3. Step 3: Cross multiply
    368,782,912.80x = 553,174,369.20 × 287,153,575.20
  4. Step 4: Simplify right side
    368,782,912.80x = 158,845,997,824,784,768
  5. Step 5: Solve for x
    x = 158,845,997,824,784,768/368,782,912.80
  6. Step 6: Final answer
    x = 430,730,362.80

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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.