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Finding the Fourth Proportional to 663,799.84, 916,188.82 and 422,035.19

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Solution

The fourth proportional to 663,799.84, 916,188.82 and 422,035.19 is: 582,500.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,799.84 : 916,188.82 = 422,035.19 : x
  2. Step 2: Convert to fraction form
    663,799.84/916,188.82 = 422,035.19/x
  3. Step 3: Cross multiply
    663,799.84x = 916,188.82 × 422,035.19
  4. Step 4: Simplify right side
    663,799.84x = 386,663,918,143.63
  5. Step 5: Solve for x
    x = 386,663,918,143.63/663,799.84
  6. Step 6: Final answer
    x = 582,500.77

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1.5x scale

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.