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Finding the Fourth Proportional to 491,188.30, 677,838.70 and 276,328.30

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Solution

The fourth proportional to 491,188.30, 677,838.70 and 276,328.30 is: 381,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,188.30 : 677,838.70 = 276,328.30 : x
  2. Step 2: Convert to fraction form
    491,188.30/677,838.70 = 276,328.30/x
  3. Step 3: Cross multiply
    491,188.30x = 677,838.70 × 276,328.30
  4. Step 4: Simplify right side
    491,188.30x = 187,306,015,645.21
  5. Step 5: Solve for x
    x = 187,306,015,645.21/491,188.30
  6. Step 6: Final answer
    x = 381,332.40

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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.