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Finding the Fourth Proportional to 640,775.64, 884,234.70 and 354,278.52

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Solution

The fourth proportional to 640,775.64, 884,234.70 and 354,278.52 is: 488,884.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,775.64 : 884,234.70 = 354,278.52 : x
  2. Step 2: Convert to fraction form
    640,775.64/884,234.70 = 354,278.52/x
  3. Step 3: Cross multiply
    640,775.64x = 884,234.70 × 354,278.52
  4. Step 4: Simplify right side
    640,775.64x = 313,265,360,848.64
  5. Step 5: Solve for x
    x = 313,265,360,848.64/640,775.64
  6. Step 6: Final answer
    x = 488,884.63

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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.