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Finding the Fourth Proportional to 663,800.58, 916,189.86 and 422,035.93

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Solution

The fourth proportional to 663,800.58, 916,189.86 and 422,035.93 is: 582,501.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,800.58 : 916,189.86 = 422,035.93 : x
  2. Step 2: Convert to fraction form
    663,800.58/916,189.86 = 422,035.93/x
  3. Step 3: Cross multiply
    663,800.58x = 916,189.86 × 422,035.93
  4. Step 4: Simplify right side
    663,800.58x = 386,665,039,621.67
  5. Step 5: Solve for x
    x = 386,665,039,621.67/663,800.58
  6. Step 6: Final answer
    x = 582,501.81

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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.