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Finding the Fourth Proportional to 458,866.70, 688,313.62 and 219,005.87

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Solution

The fourth proportional to 458,866.70, 688,313.62 and 219,005.87 is: 328,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,866.70 : 688,313.62 = 219,005.87 : x
  2. Step 2: Convert to fraction form
    458,866.70/688,313.62 = 219,005.87/x
  3. Step 3: Cross multiply
    458,866.70x = 688,313.62 × 219,005.87
  4. Step 4: Simplify right side
    458,866.70x = 150,744,724,901.73
  5. Step 5: Solve for x
    x = 150,744,724,901.73/458,866.70
  6. Step 6: Final answer
    x = 328,515.28

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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.