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Finding the Fourth Proportional to 405,629.40, 608,501.70 and 125,117.40

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Solution

The fourth proportional to 405,629.40, 608,501.70 and 125,117.40 is: 187,693.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,629.40 : 608,501.70 = 125,117.40 : x
  2. Step 2: Convert to fraction form
    405,629.40/608,501.70 = 125,117.40/x
  3. Step 3: Cross multiply
    405,629.40x = 608,501.70 × 125,117.40
  4. Step 4: Simplify right side
    405,629.40x = 76,134,150,599.58
  5. Step 5: Solve for x
    x = 76,134,150,599.58/405,629.40
  6. Step 6: Final answer
    x = 187,693.87

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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.