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Finding the Fourth Proportional to 640,636.32, 884,001.36 and 354,117.45

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Solution

The fourth proportional to 640,636.32, 884,001.36 and 354,117.45 is: 488,639.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,636.32 : 884,001.36 = 354,117.45 : x
  2. Step 2: Convert to fraction form
    640,636.32/884,001.36 = 354,117.45/x
  3. Step 3: Cross multiply
    640,636.32x = 884,001.36 × 354,117.45
  4. Step 4: Simplify right side
    640,636.32x = 313,040,307,399.73
  5. Step 5: Solve for x
    x = 313,040,307,399.73/640,636.32
  6. Step 6: Final answer
    x = 488,639.65

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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.