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Finding the Fourth Proportional to 431,705.92, 648,122.03 and 290,185.15

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Solution

The fourth proportional to 431,705.92, 648,122.03 and 290,185.15 is: 435,656.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,705.92 : 648,122.03 = 290,185.15 : x
  2. Step 2: Convert to fraction form
    431,705.92/648,122.03 = 290,185.15/x
  3. Step 3: Cross multiply
    431,705.92x = 648,122.03 × 290,185.15
  4. Step 4: Simplify right side
    431,705.92x = 188,075,388,493.86
  5. Step 5: Solve for x
    x = 188,075,388,493.86/431,705.92
  6. Step 6: Final answer
    x = 435,656.26

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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.