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Finding the Fourth Proportional to 389,825.80, 584,738.70 and 295,347.40

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Solution

The fourth proportional to 389,825.80, 584,738.70 and 295,347.40 is: 443,021.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,825.80 : 584,738.70 = 295,347.40 : x
  2. Step 2: Convert to fraction form
    389,825.80/584,738.70 = 295,347.40/x
  3. Step 3: Cross multiply
    389,825.80x = 584,738.70 × 295,347.40
  4. Step 4: Simplify right side
    389,825.80x = 172,701,054,724.38
  5. Step 5: Solve for x
    x = 172,701,054,724.38/389,825.80
  6. Step 6: Final answer
    x = 443,021.10

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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.