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Finding the Fourth Proportional to 491,560.88, 678,218.16 and 276,688.40

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Solution

The fourth proportional to 491,560.88, 678,218.16 and 276,688.40 is: 381,753.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,560.88 : 678,218.16 = 276,688.40 : x
  2. Step 2: Convert to fraction form
    491,560.88/678,218.16 = 276,688.40/x
  3. Step 3: Cross multiply
    491,560.88x = 678,218.16 × 276,688.40
  4. Step 4: Simplify right side
    491,560.88x = 187,655,097,541.34
  5. Step 5: Solve for x
    x = 187,655,097,541.34/491,560.88
  6. Step 6: Final answer
    x = 381,753.52

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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.