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Finding the Fourth Proportional to 640,857.80, 961,856.94 and 341,585.48

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Solution

The fourth proportional to 640,857.80, 961,856.94 and 341,585.48 is: 512,682.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,857.80 : 961,856.94 = 341,585.48 : x
  2. Step 2: Convert to fraction form
    640,857.80/961,856.94 = 341,585.48/x
  3. Step 3: Cross multiply
    640,857.80x = 961,856.94 × 341,585.48
  4. Step 4: Simplify right side
    640,857.80x = 328,556,364,541.23
  5. Step 5: Solve for x
    x = 328,556,364,541.23/640,857.80
  6. Step 6: Final answer
    x = 512,682.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.