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Finding the Fourth Proportional to 617,131.68, 851,705.82 and 355,496.03

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Solution

The fourth proportional to 617,131.68, 851,705.82 and 355,496.03 is: 490,621.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,131.68 : 851,705.82 = 355,496.03 : x
  2. Step 2: Convert to fraction form
    617,131.68/851,705.82 = 355,496.03/x
  3. Step 3: Cross multiply
    617,131.68x = 851,705.82 × 355,496.03
  4. Step 4: Simplify right side
    617,131.68x = 302,778,037,673.10
  5. Step 5: Solve for x
    x = 302,778,037,673.10/617,131.68
  6. Step 6: Final answer
    x = 490,621.45

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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.