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Finding the Fourth Proportional to 347,682.78, 521,567.91 and 122,990.40

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Solution

The fourth proportional to 347,682.78, 521,567.91 and 122,990.40 is: 184,501.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,682.78 : 521,567.91 = 122,990.40 : x
  2. Step 2: Convert to fraction form
    347,682.78/521,567.91 = 122,990.40/x
  3. Step 3: Cross multiply
    347,682.78x = 521,567.91 × 122,990.40
  4. Step 4: Simplify right side
    347,682.78x = 64,147,845,878.06
  5. Step 5: Solve for x
    x = 64,147,845,878.06/347,682.78
  6. Step 6: Final answer
    x = 184,501.07

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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.