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Finding the Fourth Proportional to 640,192, 883,482.78 and 353,730.56

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Solution

The fourth proportional to 640,192, 883,482.78 and 353,730.56 is: 488,158.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,192 : 883,482.78 = 353,730.56 : x
  2. Step 2: Convert to fraction form
    640,192/883,482.78 = 353,730.56/x
  3. Step 3: Cross multiply
    640,192x = 883,482.78 × 353,730.56
  4. Step 4: Simplify right side
    640,192x = 312,514,858,519.76
  5. Step 5: Solve for x
    x = 312,514,858,519.76/640,192
  6. Step 6: Final answer
    x = 488,158.02

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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.