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Finding the Fourth Proportional to 419,391.55, 578,776.72 and 238,120.34

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Solution

The fourth proportional to 419,391.55, 578,776.72 and 238,120.34 is: 328,615.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,391.55 : 578,776.72 = 238,120.34 : x
  2. Step 2: Convert to fraction form
    419,391.55/578,776.72 = 238,120.34/x
  3. Step 3: Cross multiply
    419,391.55x = 578,776.72 × 238,120.34
  4. Step 4: Simplify right side
    419,391.55x = 137,818,509,350.49
  5. Step 5: Solve for x
    x = 137,818,509,350.49/419,391.55
  6. Step 6: Final answer
    x = 328,615.37

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1.5x scale

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.