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Finding the Fourth Proportional to 640,422.42, 883,789.72 and 350,042.28

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Solution

The fourth proportional to 640,422.42, 883,789.72 and 350,042.28 is: 483,062.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,422.42 : 883,789.72 = 350,042.28 : x
  2. Step 2: Convert to fraction form
    640,422.42/883,789.72 = 350,042.28/x
  3. Step 3: Cross multiply
    640,422.42x = 883,789.72 × 350,042.28
  4. Step 4: Simplify right side
    640,422.42x = 309,363,768,629.36
  5. Step 5: Solve for x
    x = 309,363,768,629.36/640,422.42
  6. Step 6: Final answer
    x = 483,062.05

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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.