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Finding the Fourth Proportional to 663,800.34, 916,189.51 and 422,035.68

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Solution

The fourth proportional to 663,800.34, 916,189.51 and 422,035.68 is: 582,501.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,800.34 : 916,189.51 = 422,035.68 : x
  2. Step 2: Convert to fraction form
    663,800.34/916,189.51 = 422,035.68/x
  3. Step 3: Cross multiply
    663,800.34x = 916,189.51 × 422,035.68
  4. Step 4: Simplify right side
    663,800.34x = 386,664,662,861.72
  5. Step 5: Solve for x
    x = 386,664,662,861.72/663,800.34
  6. Step 6: Final answer
    x = 582,501.45

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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.