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Finding the Fourth Proportional to 447,513.65, 671,292.59 and 127,712.64

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Solution

The fourth proportional to 447,513.65, 671,292.59 and 127,712.64 is: 191,575.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,513.65 : 671,292.59 = 127,712.64 : x
  2. Step 2: Convert to fraction form
    447,513.65/671,292.59 = 127,712.64/x
  3. Step 3: Cross multiply
    447,513.65x = 671,292.59 × 127,712.64
  4. Step 4: Simplify right side
    447,513.65x = 85,732,548,242.77
  5. Step 5: Solve for x
    x = 85,732,548,242.77/447,513.65
  6. Step 6: Final answer
    x = 191,575.27

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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.