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Finding the Fourth Proportional to 665,940.80, 999,256.80 and 292,001.60

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Solution

The fourth proportional to 665,940.80, 999,256.80 and 292,001.60 is: 438,153.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,940.80 : 999,256.80 = 292,001.60 : x
  2. Step 2: Convert to fraction form
    665,940.80/999,256.80 = 292,001.60/x
  3. Step 3: Cross multiply
    665,940.80x = 999,256.80 × 292,001.60
  4. Step 4: Simplify right side
    665,940.80x = 291,784,584,410.88
  5. Step 5: Solve for x
    x = 291,784,584,410.88/665,940.80
  6. Step 6: Final answer
    x = 438,153.94

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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.