Home / 919,909.60-1,379,864.40-388,031.20

Finding the Fourth Proportional to 919,909.60, 1,379,864.40 and 388,031.20

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Solution

The fourth proportional to 919,909.60, 1,379,864.40 and 388,031.20 is: 582,046.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,909.60 : 1,379,864.40 = 388,031.20 : x
  2. Step 2: Convert to fraction form
    919,909.60/1,379,864.40 = 388,031.20/x
  3. Step 3: Cross multiply
    919,909.60x = 1,379,864.40 × 388,031.20
  4. Step 4: Simplify right side
    919,909.60x = 535,430,438,969.28
  5. Step 5: Solve for x
    x = 535,430,438,969.28/919,909.60
  6. Step 6: Final answer
    x = 582,046.80

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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.