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Finding the Fourth Proportional to 386,315.70, 579,473.55 and 379,754.70

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Solution

The fourth proportional to 386,315.70, 579,473.55 and 379,754.70 is: 569,632.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,315.70 : 579,473.55 = 379,754.70 : x
  2. Step 2: Convert to fraction form
    386,315.70/579,473.55 = 379,754.70/x
  3. Step 3: Cross multiply
    386,315.70x = 579,473.55 × 379,754.70
  4. Step 4: Simplify right side
    386,315.70x = 220,057,804,138.19
  5. Step 5: Solve for x
    x = 220,057,804,138.19/386,315.70
  6. Step 6: Final answer
    x = 569,632.05

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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.