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Finding the Fourth Proportional to 407,621.40, 611,577.90 and 171,036.60

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Solution

The fourth proportional to 407,621.40, 611,577.90 and 171,036.60 is: 256,616.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,621.40 : 611,577.90 = 171,036.60 : x
  2. Step 2: Convert to fraction form
    407,621.40/611,577.90 = 171,036.60/x
  3. Step 3: Cross multiply
    407,621.40x = 611,577.90 × 171,036.60
  4. Step 4: Simplify right side
    407,621.40x = 104,602,204,651.14
  5. Step 5: Solve for x
    x = 104,602,204,651.14/407,621.40
  6. Step 6: Final answer
    x = 256,616.08

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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.