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Finding the Fourth Proportional to 280,558.92, 386,355.83 and 243,748.11

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Solution

The fourth proportional to 280,558.92, 386,355.83 and 243,748.11 is: 335,663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,558.92 : 386,355.83 = 243,748.11 : x
  2. Step 2: Convert to fraction form
    280,558.92/386,355.83 = 243,748.11/x
  3. Step 3: Cross multiply
    280,558.92x = 386,355.83 × 243,748.11
  4. Step 4: Simplify right side
    280,558.92x = 94,173,502,435.14
  5. Step 5: Solve for x
    x = 94,173,502,435.14/280,558.92
  6. Step 6: Final answer
    x = 335,663.91

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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.