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Finding the Fourth Proportional to 664,372.80, 996,656.40 and 215,017.20

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Solution

The fourth proportional to 664,372.80, 996,656.40 and 215,017.20 is: 322,557.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,372.80 : 996,656.40 = 215,017.20 : x
  2. Step 2: Convert to fraction form
    664,372.80/996,656.40 = 215,017.20/x
  3. Step 3: Cross multiply
    664,372.80x = 996,656.40 × 215,017.20
  4. Step 4: Simplify right side
    664,372.80x = 214,298,268,490.08
  5. Step 5: Solve for x
    x = 214,298,268,490.08/664,372.80
  6. Step 6: Final answer
    x = 322,557.26

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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.