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Finding the Fourth Proportional to 617,141.05, 851,718.80 and 355,505.38

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Solution

The fourth proportional to 617,141.05, 851,718.80 and 355,505.38 is: 490,634.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,141.05 : 851,718.80 = 355,505.38 : x
  2. Step 2: Convert to fraction form
    617,141.05/851,718.80 = 355,505.38/x
  3. Step 3: Cross multiply
    617,141.05x = 851,718.80 × 355,505.38
  4. Step 4: Simplify right side
    617,141.05x = 302,790,614,802.35
  5. Step 5: Solve for x
    x = 302,790,614,802.35/617,141.05
  6. Step 6: Final answer
    x = 490,634.38

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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.