Home / 309,629.16-427,378.95-202,215.87

Finding the Fourth Proportional to 309,629.16, 427,378.95 and 202,215.87

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Solution

The fourth proportional to 309,629.16, 427,378.95 and 202,215.87 is: 279,117.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,629.16 : 427,378.95 = 202,215.87 : x
  2. Step 2: Convert to fraction form
    309,629.16/427,378.95 = 202,215.87/x
  3. Step 3: Cross multiply
    309,629.16x = 427,378.95 × 202,215.87
  4. Step 4: Simplify right side
    309,629.16x = 86,422,806,193.94
  5. Step 5: Solve for x
    x = 86,422,806,193.94/309,629.16
  6. Step 6: Final answer
    x = 279,117.14

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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.