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Finding the Fourth Proportional to 491,318.32, 678,011.34 and 276,458.26

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Solution

The fourth proportional to 491,318.32, 678,011.34 and 276,458.26 is: 381,507.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,318.32 : 678,011.34 = 276,458.26 : x
  2. Step 2: Convert to fraction form
    491,318.32/678,011.34 = 276,458.26/x
  3. Step 3: Cross multiply
    491,318.32x = 678,011.34 × 276,458.26
  4. Step 4: Simplify right side
    491,318.32x = 187,441,835,316.67
  5. Step 5: Solve for x
    x = 187,441,835,316.67/491,318.32
  6. Step 6: Final answer
    x = 381,507.93

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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.