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Finding the Fourth Proportional to 640,520.38, 883,841.57 and 354,001.51

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Solution

The fourth proportional to 640,520.38, 883,841.57 and 354,001.51 is: 488,479.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,520.38 : 883,841.57 = 354,001.51 : x
  2. Step 2: Convert to fraction form
    640,520.38/883,841.57 = 354,001.51/x
  3. Step 3: Cross multiply
    640,520.38x = 883,841.57 × 354,001.51
  4. Step 4: Simplify right side
    640,520.38x = 312,881,245,961.56
  5. Step 5: Solve for x
    x = 312,881,245,961.56/640,520.38
  6. Step 6: Final answer
    x = 488,479.77

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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.