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Finding the Fourth Proportional to 372,129.84, 558,379.32 and 147,485.40

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Solution

The fourth proportional to 372,129.84, 558,379.32 and 147,485.40 is: 221,301.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,129.84 : 558,379.32 = 147,485.40 : x
  2. Step 2: Convert to fraction form
    372,129.84/558,379.32 = 147,485.40/x
  3. Step 3: Cross multiply
    372,129.84x = 558,379.32 × 147,485.40
  4. Step 4: Simplify right side
    372,129.84x = 82,352,797,361.93
  5. Step 5: Solve for x
    x = 82,352,797,361.93/372,129.84
  6. Step 6: Final answer
    x = 221,301.25

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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.