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Finding the Fourth Proportional to 633,874.40, 874,741.65 and 347,393.81

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Solution

The fourth proportional to 633,874.40, 874,741.65 and 347,393.81 is: 479,400.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,874.40 : 874,741.65 = 347,393.81 : x
  2. Step 2: Convert to fraction form
    633,874.40/874,741.65 = 347,393.81/x
  3. Step 3: Cross multiply
    633,874.40x = 874,741.65 × 347,393.81
  4. Step 4: Simplify right side
    633,874.40x = 303,879,834,559.19
  5. Step 5: Solve for x
    x = 303,879,834,559.19/633,874.40
  6. Step 6: Final answer
    x = 479,400.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.