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Finding the Fourth Proportional to 386,280.80, 579,421.20 and 334,440.80

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Solution

The fourth proportional to 386,280.80, 579,421.20 and 334,440.80 is: 501,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,280.80 : 579,421.20 = 334,440.80 : x
  2. Step 2: Convert to fraction form
    386,280.80/579,421.20 = 334,440.80/x
  3. Step 3: Cross multiply
    386,280.80x = 579,421.20 × 334,440.80
  4. Step 4: Simplify right side
    386,280.80x = 193,782,089,664.96
  5. Step 5: Solve for x
    x = 193,782,089,664.96/386,280.80
  6. Step 6: Final answer
    x = 501,661.20

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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.