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Finding the Fourth Proportional to 640,460.75, 883,881.60 and 353,974.68

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Solution

The fourth proportional to 640,460.75, 883,881.60 and 353,974.68 is: 488,510.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,460.75 : 883,881.60 = 353,974.68 : x
  2. Step 2: Convert to fraction form
    640,460.75/883,881.60 = 353,974.68/x
  3. Step 3: Cross multiply
    640,460.75x = 883,881.60 × 353,974.68
  4. Step 4: Simplify right side
    640,460.75x = 312,871,706,517.89
  5. Step 5: Solve for x
    x = 312,871,706,517.89/640,460.75
  6. Step 6: Final answer
    x = 488,510.35

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Half scale
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Double scale
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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.