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Finding the Fourth Proportional to 326,051.94, 489,078.21 and 262,574.40

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Solution

The fourth proportional to 326,051.94, 489,078.21 and 262,574.40 is: 393,861.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,051.94 : 489,078.21 = 262,574.40 : x
  2. Step 2: Convert to fraction form
    326,051.94/489,078.21 = 262,574.40/x
  3. Step 3: Cross multiply
    326,051.94x = 489,078.21 × 262,574.40
  4. Step 4: Simplify right side
    326,051.94x = 128,419,417,543.82
  5. Step 5: Solve for x
    x = 128,419,417,543.82/326,051.94
  6. Step 6: Final answer
    x = 393,861.84

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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.