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Finding the Fourth Proportional to 907,817, 1,361,331.60 and 308,617.20

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Solution

The fourth proportional to 907,817, 1,361,331.60 and 308,617.20 is: 462,791.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,817 : 1,361,331.60 = 308,617.20 : x
  2. Step 2: Convert to fraction form
    907,817/1,361,331.60 = 308,617.20/x
  3. Step 3: Cross multiply
    907,817x = 1,361,331.60 × 308,617.20
  4. Step 4: Simplify right side
    907,817x = 420,130,346,663.52
  5. Step 5: Solve for x
    x = 420,130,346,663.52/907,817
  6. Step 6: Final answer
    x = 462,791.89

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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.