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Finding the Fourth Proportional to 389,615.70, 584,423.55 and 336,471.60

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Solution

The fourth proportional to 389,615.70, 584,423.55 and 336,471.60 is: 504,707.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,615.70 : 584,423.55 = 336,471.60 : x
  2. Step 2: Convert to fraction form
    389,615.70/584,423.55 = 336,471.60/x
  3. Step 3: Cross multiply
    389,615.70x = 584,423.55 × 336,471.60
  4. Step 4: Simplify right side
    389,615.70x = 196,641,926,946.18
  5. Step 5: Solve for x
    x = 196,641,926,946.18/389,615.70
  6. Step 6: Final answer
    x = 504,707.40

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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.