Home / 721,447.76-1,081,838.03-405,904.64

Finding the Fourth Proportional to 721,447.76, 1,081,838.03 and 405,904.64

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Solution

The fourth proportional to 721,447.76, 1,081,838.03 and 405,904.64 is: 608,669.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,447.76 : 1,081,838.03 = 405,904.64 : x
  2. Step 2: Convert to fraction form
    721,447.76/1,081,838.03 = 405,904.64/x
  3. Step 3: Cross multiply
    721,447.76x = 1,081,838.03 × 405,904.64
  4. Step 4: Simplify right side
    721,447.76x = 439,123,068,666.75
  5. Step 5: Solve for x
    x = 439,123,068,666.75/721,447.76
  6. Step 6: Final answer
    x = 608,669.25

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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.