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Finding the Fourth Proportional to 453,078, 679,619.16 and 120,654

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Solution

The fourth proportional to 453,078, 679,619.16 and 120,654 is: 180,981.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,078 : 679,619.16 = 120,654 : x
  2. Step 2: Convert to fraction form
    453,078/679,619.16 = 120,654/x
  3. Step 3: Cross multiply
    453,078x = 679,619.16 × 120,654
  4. Step 4: Simplify right side
    453,078x = 81,998,770,130.64
  5. Step 5: Solve for x
    x = 81,998,770,130.64/453,078
  6. Step 6: Final answer
    x = 180,981.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.