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Finding the Fourth Proportional to 663,798.58, 916,187.10 and 422,033.93

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Solution

The fourth proportional to 663,798.58, 916,187.10 and 422,033.93 is: 582,499.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,798.58 : 916,187.10 = 422,033.93 : x
  2. Step 2: Convert to fraction form
    663,798.58/916,187.10 = 422,033.93/x
  3. Step 3: Cross multiply
    663,798.58x = 916,187.10 × 422,033.93
  4. Step 4: Simplify right side
    663,798.58x = 386,662,043,268.86
  5. Step 5: Solve for x
    x = 386,662,043,268.86/663,798.58
  6. Step 6: Final answer
    x = 582,499.05

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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.