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Finding the Fourth Proportional to 459,803.88, 689,706.09 and 127,379.88

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Solution

The fourth proportional to 459,803.88, 689,706.09 and 127,379.88 is: 191,069.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,803.88 : 689,706.09 = 127,379.88 : x
  2. Step 2: Convert to fraction form
    459,803.88/689,706.09 = 127,379.88/x
  3. Step 3: Cross multiply
    459,803.88x = 689,706.09 × 127,379.88
  4. Step 4: Simplify right side
    459,803.88x = 87,854,678,979.47
  5. Step 5: Solve for x
    x = 87,854,678,979.47/459,803.88
  6. Step 6: Final answer
    x = 191,069.89

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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.