Home / 721,065.28-1,082,578.40-405,743.68

Finding the Fourth Proportional to 721,065.28, 1,082,578.40 and 405,743.68

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Solution

The fourth proportional to 721,065.28, 1,082,578.40 and 405,743.68 is: 609,167.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,065.28 : 1,082,578.40 = 405,743.68 : x
  2. Step 2: Convert to fraction form
    721,065.28/1,082,578.40 = 405,743.68/x
  3. Step 3: Cross multiply
    721,065.28x = 1,082,578.40 × 405,743.68
  4. Step 4: Simplify right side
    721,065.28x = 439,249,343,904.51
  5. Step 5: Solve for x
    x = 439,249,343,904.51/721,065.28
  6. Step 6: Final answer
    x = 609,167.24

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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.