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Finding the Fourth Proportional to 426,842.48, 640,333.26 and 199,365.62

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Solution

The fourth proportional to 426,842.48, 640,333.26 and 199,365.62 is: 299,080.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,842.48 : 640,333.26 = 199,365.62 : x
  2. Step 2: Convert to fraction form
    426,842.48/640,333.26 = 199,365.62/x
  3. Step 3: Cross multiply
    426,842.48x = 640,333.26 × 199,365.62
  4. Step 4: Simplify right side
    426,842.48x = 127,660,437,386.52
  5. Step 5: Solve for x
    x = 127,660,437,386.52/426,842.48
  6. Step 6: Final answer
    x = 299,080.91

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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.