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Finding the Fourth Proportional to 489,771, 676,137.42 and 380,631.42

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Solution

The fourth proportional to 489,771, 676,137.42 and 380,631.42 is: 525,468.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,771 : 676,137.42 = 380,631.42 : x
  2. Step 2: Convert to fraction form
    489,771/676,137.42 = 380,631.42/x
  3. Step 3: Cross multiply
    489,771x = 676,137.42 × 380,631.42
  4. Step 4: Simplify right side
    489,771x = 257,359,146,289.74
  5. Step 5: Solve for x
    x = 257,359,146,289.74/489,771
  6. Step 6: Final answer
    x = 525,468.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.