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Finding the Fourth Proportional to 622,663.60, 933,985.80 and 422,486.32

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Solution

The fourth proportional to 622,663.60, 933,985.80 and 422,486.32 is: 633,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,663.60 : 933,985.80 = 422,486.32 : x
  2. Step 2: Convert to fraction form
    622,663.60/933,985.80 = 422,486.32/x
  3. Step 3: Cross multiply
    622,663.60x = 933,985.80 × 422,486.32
  4. Step 4: Simplify right side
    622,663.60x = 394,596,223,574.26
  5. Step 5: Solve for x
    x = 394,596,223,574.26/622,663.60
  6. Step 6: Final answer
    x = 633,722.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.