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Finding the Fourth Proportional to 553,579.44, 763,941.96 and 311,864.94

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Solution

The fourth proportional to 553,579.44, 763,941.96 and 311,864.94 is: 430,374.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,579.44 : 763,941.96 = 311,864.94 : x
  2. Step 2: Convert to fraction form
    553,579.44/763,941.96 = 311,864.94/x
  3. Step 3: Cross multiply
    553,579.44x = 763,941.96 × 311,864.94
  4. Step 4: Simplify right side
    553,579.44x = 238,246,713,518.88
  5. Step 5: Solve for x
    x = 238,246,713,518.88/553,579.44
  6. Step 6: Final answer
    x = 430,374.93

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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.