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Finding the Fourth Proportional to 349,921, 524,959.26 and 128,305

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Solution

The fourth proportional to 349,921, 524,959.26 and 128,305 is: 192,486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,921 : 524,959.26 = 128,305 : x
  2. Step 2: Convert to fraction form
    349,921/524,959.26 = 128,305/x
  3. Step 3: Cross multiply
    349,921x = 524,959.26 × 128,305
  4. Step 4: Simplify right side
    349,921x = 67,354,897,854.30
  5. Step 5: Solve for x
    x = 67,354,897,854.30/349,921
  6. Step 6: Final answer
    x = 192,486.01

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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.