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Finding the Fourth Proportional to 491,088.76, 677,698.55 and 276,248.81

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Solution

The fourth proportional to 491,088.76, 677,698.55 and 276,248.81 is: 381,221.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,088.76 : 677,698.55 = 276,248.81 : x
  2. Step 2: Convert to fraction form
    491,088.76/677,698.55 = 276,248.81/x
  3. Step 3: Cross multiply
    491,088.76x = 677,698.55 × 276,248.81
  4. Step 4: Simplify right side
    491,088.76x = 187,213,419,325.16
  5. Step 5: Solve for x
    x = 187,213,419,325.16/491,088.76
  6. Step 6: Final answer
    x = 381,221.15

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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.