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Finding the Fourth Proportional to 405,271.80, 607,850.10 and 124,817.40

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Solution

The fourth proportional to 405,271.80, 607,850.10 and 124,817.40 is: 187,208.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,271.80 : 607,850.10 = 124,817.40 : x
  2. Step 2: Convert to fraction form
    405,271.80/607,850.10 = 124,817.40/x
  3. Step 3: Cross multiply
    405,271.80x = 607,850.10 × 124,817.40
  4. Step 4: Simplify right side
    405,271.80x = 75,870,269,071.74
  5. Step 5: Solve for x
    x = 75,870,269,071.74/405,271.80
  6. Step 6: Final answer
    x = 187,208.36

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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.