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Finding the Fourth Proportional to 309,053.88, 426,421.25 and 174,917.88

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Solution

The fourth proportional to 309,053.88, 426,421.25 and 174,917.88 is: 241,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,053.88 : 426,421.25 = 174,917.88 : x
  2. Step 2: Convert to fraction form
    309,053.88/426,421.25 = 174,917.88/x
  3. Step 3: Cross multiply
    309,053.88x = 426,421.25 × 174,917.88
  4. Step 4: Simplify right side
    309,053.88x = 74,588,701,036.95
  5. Step 5: Solve for x
    x = 74,588,701,036.95/309,053.88
  6. Step 6: Final answer
    x = 241,345.30

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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.