Home / 487,918.89-673,741.40-306,689.19

Finding the Fourth Proportional to 487,918.89, 673,741.40 and 306,689.19

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Solution

The fourth proportional to 487,918.89, 673,741.40 and 306,689.19 is: 423,490.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,918.89 : 673,741.40 = 306,689.19 : x
  2. Step 2: Convert to fraction form
    487,918.89/673,741.40 = 306,689.19/x
  3. Step 3: Cross multiply
    487,918.89x = 673,741.40 × 306,689.19
  4. Step 4: Simplify right side
    487,918.89x = 206,629,204,235.47
  5. Step 5: Solve for x
    x = 206,629,204,235.47/487,918.89
  6. Step 6: Final answer
    x = 423,490.89

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Find fourth proportional to 487,919.89, 673,742.78 and 306,690.19
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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.