Home / 386,718.80-579,939.50-133,931.40

Finding the Fourth Proportional to 386,718.80, 579,939.50 and 133,931.40

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Solution

The fourth proportional to 386,718.80, 579,939.50 and 133,931.40 is: 200,849.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,718.80 : 579,939.50 = 133,931.40 : x
  2. Step 2: Convert to fraction form
    386,718.80/579,939.50 = 133,931.40/x
  3. Step 3: Cross multiply
    386,718.80x = 579,939.50 × 133,931.40
  4. Step 4: Simplify right side
    386,718.80x = 77,672,109,150.30
  5. Step 5: Solve for x
    x = 77,672,109,150.30/386,718.80
  6. Step 6: Final answer
    x = 200,849.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.