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Finding the Fourth Proportional to 3,753,318.78, 5,629,978.76 and 913,430.93

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Solution

The fourth proportional to 3,753,318.78, 5,629,978.76 and 913,430.93 is: 1,370,146.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,753,318.78 : 5,629,978.76 = 913,430.93 : x
  2. Step 2: Convert to fraction form
    3,753,318.78/5,629,978.76 = 913,430.93/x
  3. Step 3: Cross multiply
    3,753,318.78x = 5,629,978.76 × 913,430.93
  4. Step 4: Simplify right side
    3,753,318.78x = 5,142,596,701,910.00
  5. Step 5: Solve for x
    x = 5,142,596,701,910.00/3,753,318.78
  6. Step 6: Final answer
    x = 1,370,146.53

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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.