Home / 715,221.92-986,765.58-405,082.28

Finding the Fourth Proportional to 715,221.92, 986,765.58 and 405,082.28

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Solution

The fourth proportional to 715,221.92, 986,765.58 and 405,082.28 is: 558,877.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,221.92 : 986,765.58 = 405,082.28 : x
  2. Step 2: Convert to fraction form
    715,221.92/986,765.58 = 405,082.28/x
  3. Step 3: Cross multiply
    715,221.92x = 986,765.58 × 405,082.28
  4. Step 4: Simplify right side
    715,221.92x = 399,721,250,971.92
  5. Step 5: Solve for x
    x = 399,721,250,971.92/715,221.92
  6. Step 6: Final answer
    x = 558,877.24

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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.