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Finding the Fourth Proportional to 491,561.36, 678,347.16 and 276,700.76

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Solution

The fourth proportional to 491,561.36, 678,347.16 and 276,700.76 is: 381,842.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,561.36 : 678,347.16 = 276,700.76 : x
  2. Step 2: Convert to fraction form
    491,561.36/678,347.16 = 276,700.76/x
  3. Step 3: Cross multiply
    491,561.36x = 678,347.16 × 276,700.76
  4. Step 4: Simplify right side
    491,561.36x = 187,699,174,715.84
  5. Step 5: Solve for x
    x = 187,699,174,715.84/491,561.36
  6. Step 6: Final answer
    x = 381,842.82

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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.