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Finding the Fourth Proportional to 299,721.42, 447,395.61 and 261,886.98

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Solution

The fourth proportional to 299,721.42, 447,395.61 and 261,886.98 is: 390,919.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,721.42 : 447,395.61 = 261,886.98 : x
  2. Step 2: Convert to fraction form
    299,721.42/447,395.61 = 261,886.98/x
  3. Step 3: Cross multiply
    299,721.42x = 447,395.61 × 261,886.98
  4. Step 4: Simplify right side
    299,721.42x = 117,167,085,168.16
  5. Step 5: Solve for x
    x = 117,167,085,168.16/299,721.42
  6. Step 6: Final answer
    x = 390,919.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.