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Finding the Fourth Proportional to 720,558.06, 994,374.03 and 393,871.52

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Solution

The fourth proportional to 720,558.06, 994,374.03 and 393,871.52 is: 543,544.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,558.06 : 994,374.03 = 393,871.52 : x
  2. Step 2: Convert to fraction form
    720,558.06/994,374.03 = 393,871.52/x
  3. Step 3: Cross multiply
    720,558.06x = 994,374.03 × 393,871.52
  4. Step 4: Simplify right side
    720,558.06x = 391,655,605,672.76
  5. Step 5: Solve for x
    x = 391,655,605,672.76/720,558.06
  6. Step 6: Final answer
    x = 543,544.83

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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.