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Finding the Fourth Proportional to 403,749,505.20, 605,624,257.80 and 220,083,495.60

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Solution

The fourth proportional to 403,749,505.20, 605,624,257.80 and 220,083,495.60 is: 330,125,243.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,749,505.20 : 605,624,257.80 = 220,083,495.60 : x
  2. Step 2: Convert to fraction form
    403,749,505.20/605,624,257.80 = 220,083,495.60/x
  3. Step 3: Cross multiply
    403,749,505.20x = 605,624,257.80 × 220,083,495.60
  4. Step 4: Simplify right side
    403,749,505.20x = 133,287,903,676,779,552
  5. Step 5: Solve for x
    x = 133,287,903,676,779,552/403,749,505.20
  6. Step 6: Final answer
    x = 330,125,243.40

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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.