Home / 640,288.32-883,615.70-353,826.85

Finding the Fourth Proportional to 640,288.32, 883,615.70 and 353,826.85

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Solution

The fourth proportional to 640,288.32, 883,615.70 and 353,826.85 is: 488,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,288.32 : 883,615.70 = 353,826.85 : x
  2. Step 2: Convert to fraction form
    640,288.32/883,615.70 = 353,826.85/x
  3. Step 3: Cross multiply
    640,288.32x = 883,615.70 × 353,826.85
  4. Step 4: Simplify right side
    640,288.32x = 312,646,959,741.55
  5. Step 5: Solve for x
    x = 312,646,959,741.55/640,288.32
  6. Step 6: Final answer
    x = 488,290.90

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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.