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Finding the Fourth Proportional to 392,888.07, 542,230.50 and 218,475.69

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Solution

The fourth proportional to 392,888.07, 542,230.50 and 218,475.69 is: 301,521.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,888.07 : 542,230.50 = 218,475.69 : x
  2. Step 2: Convert to fraction form
    392,888.07/542,230.50 = 218,475.69/x
  3. Step 3: Cross multiply
    392,888.07x = 542,230.50 × 218,475.69
  4. Step 4: Simplify right side
    392,888.07x = 118,464,182,626.55
  5. Step 5: Solve for x
    x = 118,464,182,626.55/392,888.07
  6. Step 6: Final answer
    x = 301,521.46

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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.