Home / 935,610.78-1,291,143.80-505,890.80

Finding the Fourth Proportional to 935,610.78, 1,291,143.80 and 505,890.80

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Solution

The fourth proportional to 935,610.78, 1,291,143.80 and 505,890.80 is: 698,129.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    935,610.78 : 1,291,143.80 = 505,890.80 : x
  2. Step 2: Convert to fraction form
    935,610.78/1,291,143.80 = 505,890.80/x
  3. Step 3: Cross multiply
    935,610.78x = 1,291,143.80 × 505,890.80
  4. Step 4: Simplify right side
    935,610.78x = 653,177,766,702.20
  5. Step 5: Solve for x
    x = 653,177,766,702.20/935,610.78
  6. Step 6: Final answer
    x = 698,129.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.