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Finding the Fourth Proportional to 405,271.20, 607,906.80 and 124,874.40

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Solution

The fourth proportional to 405,271.20, 607,906.80 and 124,874.40 is: 187,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,271.20 : 607,906.80 = 124,874.40 : x
  2. Step 2: Convert to fraction form
    405,271.20/607,906.80 = 124,874.40/x
  3. Step 3: Cross multiply
    405,271.20x = 607,906.80 × 124,874.40
  4. Step 4: Simplify right side
    405,271.20x = 75,911,996,905.92
  5. Step 5: Solve for x
    x = 75,911,996,905.92/405,271.20
  6. Step 6: Final answer
    x = 187,311.60

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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.