Home / 312,868.16-431,644.92-205,496.40

Finding the Fourth Proportional to 312,868.16, 431,644.92 and 205,496.40

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Solution

The fourth proportional to 312,868.16, 431,644.92 and 205,496.40 is: 283,510.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,868.16 : 431,644.92 = 205,496.40 : x
  2. Step 2: Convert to fraction form
    312,868.16/431,644.92 = 205,496.40/x
  3. Step 3: Cross multiply
    312,868.16x = 431,644.92 × 205,496.40
  4. Step 4: Simplify right side
    312,868.16x = 88,701,477,138.29
  5. Step 5: Solve for x
    x = 88,701,477,138.29/312,868.16
  6. Step 6: Final answer
    x = 283,510.72

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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.