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Finding the Fourth Proportional to 521,881.72, 782,870.40 and 162,054.64

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Solution

The fourth proportional to 521,881.72, 782,870.40 and 162,054.64 is: 243,096.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,881.72 : 782,870.40 = 162,054.64 : x
  2. Step 2: Convert to fraction form
    521,881.72/782,870.40 = 162,054.64/x
  3. Step 3: Cross multiply
    521,881.72x = 782,870.40 × 162,054.64
  4. Step 4: Simplify right side
    521,881.72x = 126,867,780,838.66
  5. Step 5: Solve for x
    x = 126,867,780,838.66/521,881.72
  6. Step 6: Final answer
    x = 243,096.81

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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.