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Finding the Fourth Proportional to 379,367.06, 522,918.48 and 256,820.79

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Solution

The fourth proportional to 379,367.06, 522,918.48 and 256,820.79 is: 354,001.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,367.06 : 522,918.48 = 256,820.79 : x
  2. Step 2: Convert to fraction form
    379,367.06/522,918.48 = 256,820.79/x
  3. Step 3: Cross multiply
    379,367.06x = 522,918.48 × 256,820.79
  4. Step 4: Simplify right side
    379,367.06x = 134,296,337,139.20
  5. Step 5: Solve for x
    x = 134,296,337,139.20/379,367.06
  6. Step 6: Final answer
    x = 354,001.05

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1.5x scale

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.