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Finding the Fourth Proportional to 405,898.68, 608,676.65 and 121,629.69

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Solution

The fourth proportional to 405,898.68, 608,676.65 and 121,629.69 is: 182,393.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,898.68 : 608,676.65 = 121,629.69 : x
  2. Step 2: Convert to fraction form
    405,898.68/608,676.65 = 121,629.69/x
  3. Step 3: Cross multiply
    405,898.68x = 608,676.65 × 121,629.69
  4. Step 4: Simplify right side
    405,898.68x = 74,033,151,641.59
  5. Step 5: Solve for x
    x = 74,033,151,641.59/405,898.68
  6. Step 6: Final answer
    x = 182,393.18

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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.