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Finding the Fourth Proportional to 405,478.80, 608,160.60 and 125,024.40

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Solution

The fourth proportional to 405,478.80, 608,160.60 and 125,024.40 is: 187,518.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,478.80 : 608,160.60 = 125,024.40 : x
  2. Step 2: Convert to fraction form
    405,478.80/608,160.60 = 125,024.40/x
  3. Step 3: Cross multiply
    405,478.80x = 608,160.60 × 125,024.40
  4. Step 4: Simplify right side
    405,478.80x = 76,034,914,118.64
  5. Step 5: Solve for x
    x = 76,034,914,118.64/405,478.80
  6. Step 6: Final answer
    x = 187,518.84

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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.