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Finding the Fourth Proportional to 491,569.16, 678,363.66 and 276,709.77

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Solution

The fourth proportional to 491,569.16, 678,363.66 and 276,709.77 is: 381,858.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,569.16 : 678,363.66 = 276,709.77 : x
  2. Step 2: Convert to fraction form
    491,569.16/678,363.66 = 276,709.77/x
  3. Step 3: Cross multiply
    491,569.16x = 678,363.66 × 276,709.77
  4. Step 4: Simplify right side
    491,569.16x = 187,709,852,334.96
  5. Step 5: Solve for x
    x = 187,709,852,334.96/491,569.16
  6. Step 6: Final answer
    x = 381,858.48

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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.