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Finding the Fourth Proportional to 663,801.34, 916,190.89 and 422,036.68

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Solution

The fourth proportional to 663,801.34, 916,190.89 and 422,036.68 is: 582,502.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,801.34 : 916,190.89 = 422,036.68 : x
  2. Step 2: Convert to fraction form
    663,801.34/916,190.89 = 422,036.68/x
  3. Step 3: Cross multiply
    663,801.34x = 916,190.89 × 422,036.68
  4. Step 4: Simplify right side
    663,801.34x = 386,666,161,461.85
  5. Step 5: Solve for x
    x = 386,666,161,461.85/663,801.34
  6. Step 6: Final answer
    x = 582,502.83

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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.