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Finding the Fourth Proportional to 545,420.16, 817,856.40 and 317,789.44

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Solution

The fourth proportional to 545,420.16, 817,856.40 and 317,789.44 is: 476,524.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,420.16 : 817,856.40 = 317,789.44 : x
  2. Step 2: Convert to fraction form
    545,420.16/817,856.40 = 317,789.44/x
  3. Step 3: Cross multiply
    545,420.16x = 817,856.40 × 317,789.44
  4. Step 4: Simplify right side
    545,420.16x = 259,906,127,356.42
  5. Step 5: Solve for x
    x = 259,906,127,356.42/545,420.16
  6. Step 6: Final answer
    x = 476,524.61

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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.