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Finding the Fourth Proportional to 505,983.76, 698,331.72 and 304,775.44

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Solution

The fourth proportional to 505,983.76, 698,331.72 and 304,775.44 is: 420,634.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,983.76 : 698,331.72 = 304,775.44 : x
  2. Step 2: Convert to fraction form
    505,983.76/698,331.72 = 304,775.44/x
  3. Step 3: Cross multiply
    505,983.76x = 698,331.72 × 304,775.44
  4. Step 4: Simplify right side
    505,983.76x = 212,834,357,228.96
  5. Step 5: Solve for x
    x = 212,834,357,228.96/505,983.76
  6. Step 6: Final answer
    x = 420,634.76

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1.5x scale

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.