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Finding the Fourth Proportional to 668,418.72, 922,259.16 and 378,036.96

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Solution

The fourth proportional to 668,418.72, 922,259.16 and 378,036.96 is: 521,601.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,418.72 : 922,259.16 = 378,036.96 : x
  2. Step 2: Convert to fraction form
    668,418.72/922,259.16 = 378,036.96/x
  3. Step 3: Cross multiply
    668,418.72x = 922,259.16 × 378,036.96
  4. Step 4: Simplify right side
    668,418.72x = 348,648,049,178.55
  5. Step 5: Solve for x
    x = 348,648,049,178.55/668,418.72
  6. Step 6: Final answer
    x = 521,601.26

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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.