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Finding the Fourth Proportional to 393,658,848.80, 590,488,273.20 and 189,137,607.20

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Solution

The fourth proportional to 393,658,848.80, 590,488,273.20 and 189,137,607.20 is: 283,706,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,658,848.80 : 590,488,273.20 = 189,137,607.20 : x
  2. Step 2: Convert to fraction form
    393,658,848.80/590,488,273.20 = 189,137,607.20/x
  3. Step 3: Cross multiply
    393,658,848.80x = 590,488,273.20 × 189,137,607.20
  4. Step 4: Simplify right side
    393,658,848.80x = 111,683,539,072,707,888
  5. Step 5: Solve for x
    x = 111,683,539,072,707,888/393,658,848.80
  6. Step 6: Final answer
    x = 283,706,410.80

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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.