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Finding the Fourth Proportional to 447,607.89, 671,434.14 and 127,807.20

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Solution

The fourth proportional to 447,607.89, 671,434.14 and 127,807.20 is: 191,717.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,607.89 : 671,434.14 = 127,807.20 : x
  2. Step 2: Convert to fraction form
    447,607.89/671,434.14 = 127,807.20/x
  3. Step 3: Cross multiply
    447,607.89x = 671,434.14 × 127,807.20
  4. Step 4: Simplify right side
    447,607.89x = 85,814,117,897.09
  5. Step 5: Solve for x
    x = 85,814,117,897.09/447,607.89
  6. Step 6: Final answer
    x = 191,717.17

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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.