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Finding the Fourth Proportional to 633,870.90, 874,736.82 and 347,390.30

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Solution

The fourth proportional to 633,870.90, 874,736.82 and 347,390.30 is: 479,395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,870.90 : 874,736.82 = 347,390.30 : x
  2. Step 2: Convert to fraction form
    633,870.90/874,736.82 = 347,390.30/x
  3. Step 3: Cross multiply
    633,870.90x = 874,736.82 × 347,390.30
  4. Step 4: Simplify right side
    633,870.90x = 303,875,088,507.69
  5. Step 5: Solve for x
    x = 303,875,088,507.69/633,870.90
  6. Step 6: Final answer
    x = 479,395.87

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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.