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Finding the Fourth Proportional to 405,211.70, 607,817.55 and 124,814.90

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Solution

The fourth proportional to 405,211.70, 607,817.55 and 124,814.90 is: 187,222.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,211.70 : 607,817.55 = 124,814.90 : x
  2. Step 2: Convert to fraction form
    405,211.70/607,817.55 = 124,814.90/x
  3. Step 3: Cross multiply
    405,211.70x = 607,817.55 × 124,814.90
  4. Step 4: Simplify right side
    405,211.70x = 75,864,686,721.50
  5. Step 5: Solve for x
    x = 75,864,686,721.50/405,211.70
  6. Step 6: Final answer
    x = 187,222.35

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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.