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Finding the Fourth Proportional to 553,357.92, 763,671.08 and 308,380.72

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Solution

The fourth proportional to 553,357.92, 763,671.08 and 308,380.72 is: 425,586.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,357.92 : 763,671.08 = 308,380.72 : x
  2. Step 2: Convert to fraction form
    553,357.92/763,671.08 = 308,380.72/x
  3. Step 3: Cross multiply
    553,357.92x = 763,671.08 × 308,380.72
  4. Step 4: Simplify right side
    553,357.92x = 235,501,437,493.58
  5. Step 5: Solve for x
    x = 235,501,437,493.58/553,357.92
  6. Step 6: Final answer
    x = 425,586.10

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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.