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Finding the Fourth Proportional to 553,272.68, 763,508.78 and 311,558.15

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Solution

The fourth proportional to 553,272.68, 763,508.78 and 311,558.15 is: 429,946.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,272.68 : 763,508.78 = 311,558.15 : x
  2. Step 2: Convert to fraction form
    553,272.68/763,508.78 = 311,558.15/x
  3. Step 3: Cross multiply
    553,272.68x = 763,508.78 × 311,558.15
  4. Step 4: Simplify right side
    553,272.68x = 237,877,383,005.56
  5. Step 5: Solve for x
    x = 237,877,383,005.56/553,272.68
  6. Step 6: Final answer
    x = 429,946.01

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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.