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Finding the Fourth Proportional to 291,705.40, 437,558.10 and 247,965.40

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Solution

The fourth proportional to 291,705.40, 437,558.10 and 247,965.40 is: 371,948.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,705.40 : 437,558.10 = 247,965.40 : x
  2. Step 2: Convert to fraction form
    291,705.40/437,558.10 = 247,965.40/x
  3. Step 3: Cross multiply
    291,705.40x = 437,558.10 × 247,965.40
  4. Step 4: Simplify right side
    291,705.40x = 108,499,269,289.74
  5. Step 5: Solve for x
    x = 108,499,269,289.74/291,705.40
  6. Step 6: Final answer
    x = 371,948.10

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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.