Home / 389,986.74-537,661.26-309,680.10

Finding the Fourth Proportional to 389,986.74, 537,661.26 and 309,680.10

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Solution

The fourth proportional to 389,986.74, 537,661.26 and 309,680.10 is: 426,945.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,986.74 : 537,661.26 = 309,680.10 : x
  2. Step 2: Convert to fraction form
    389,986.74/537,661.26 = 309,680.10/x
  3. Step 3: Cross multiply
    389,986.74x = 537,661.26 × 309,680.10
  4. Step 4: Simplify right side
    389,986.74x = 166,502,992,762.93
  5. Step 5: Solve for x
    x = 166,502,992,762.93/389,986.74
  6. Step 6: Final answer
    x = 426,945.27

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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.