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Finding the Fourth Proportional to 640,392.41, 883,716.89 and 368,547.63

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Solution

The fourth proportional to 640,392.41, 883,716.89 and 368,547.63 is: 508,581.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,392.41 : 883,716.89 = 368,547.63 : x
  2. Step 2: Convert to fraction form
    640,392.41/883,716.89 = 368,547.63/x
  3. Step 3: Cross multiply
    640,392.41x = 883,716.89 × 368,547.63
  4. Step 4: Simplify right side
    640,392.41x = 325,691,763,557.73
  5. Step 5: Solve for x
    x = 325,691,763,557.73/640,392.41
  6. Step 6: Final answer
    x = 508,581.55

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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.