Home / 747,905.40-1,121,129.10-427,728.60

Finding the Fourth Proportional to 747,905.40, 1,121,129.10 and 427,728.60

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Solution

The fourth proportional to 747,905.40, 1,121,129.10 and 427,728.60 is: 641,175.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,905.40 : 1,121,129.10 = 427,728.60 : x
  2. Step 2: Convert to fraction form
    747,905.40/1,121,129.10 = 427,728.60/x
  3. Step 3: Cross multiply
    747,905.40x = 1,121,129.10 × 427,728.60
  4. Step 4: Simplify right side
    747,905.40x = 479,538,980,362.26
  5. Step 5: Solve for x
    x = 479,538,980,362.26/747,905.40
  6. Step 6: Final answer
    x = 641,175.98

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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.