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Finding the Fourth Proportional to 326,392.31, 489,739.13 and 148,953.71

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Solution

The fourth proportional to 326,392.31, 489,739.13 and 148,953.71 is: 223,499.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,392.31 : 489,739.13 = 148,953.71 : x
  2. Step 2: Convert to fraction form
    326,392.31/489,739.13 = 148,953.71/x
  3. Step 3: Cross multiply
    326,392.31x = 489,739.13 × 148,953.71
  4. Step 4: Simplify right side
    326,392.31x = 72,948,460,345.67
  5. Step 5: Solve for x
    x = 72,948,460,345.67/326,392.31
  6. Step 6: Final answer
    x = 223,499.32

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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.