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Finding the Fourth Proportional to 459,586.70, 689,379.02 and 218,970.23

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Solution

The fourth proportional to 459,586.70, 689,379.02 and 218,970.23 is: 328,454.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,586.70 : 689,379.02 = 218,970.23 : x
  2. Step 2: Convert to fraction form
    459,586.70/689,379.02 = 218,970.23/x
  3. Step 3: Cross multiply
    459,586.70x = 689,379.02 × 218,970.23
  4. Step 4: Simplify right side
    459,586.70x = 150,953,478,024.83
  5. Step 5: Solve for x
    x = 150,953,478,024.83/459,586.70
  6. Step 6: Final answer
    x = 328,454.85

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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.