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Finding the Fourth Proportional to 392,347.72, 587,749.65 and 258,820.03

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Solution

The fourth proportional to 392,347.72, 587,749.65 and 258,820.03 is: 387,720.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,347.72 : 587,749.65 = 258,820.03 : x
  2. Step 2: Convert to fraction form
    392,347.72/587,749.65 = 258,820.03/x
  3. Step 3: Cross multiply
    392,347.72x = 587,749.65 × 258,820.03
  4. Step 4: Simplify right side
    392,347.72x = 152,121,382,045.49
  5. Step 5: Solve for x
    x = 152,121,382,045.49/392,347.72
  6. Step 6: Final answer
    x = 387,720.83

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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.