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Finding the Fourth Proportional to 386,271, 578,730.87 and 268,017.48

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Solution

The fourth proportional to 386,271, 578,730.87 and 268,017.48 is: 401,557.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,271 : 578,730.87 = 268,017.48 : x
  2. Step 2: Convert to fraction form
    386,271/578,730.87 = 268,017.48/x
  3. Step 3: Cross multiply
    386,271x = 578,730.87 × 268,017.48
  4. Step 4: Simplify right side
    386,271x = 155,109,989,375.61
  5. Step 5: Solve for x
    x = 155,109,989,375.61/386,271
  6. Step 6: Final answer
    x = 401,557.43

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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.