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Finding the Fourth Proportional to 326,398.34, 489,260.70 and 136,968.74

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Solution

The fourth proportional to 326,398.34, 489,260.70 and 136,968.74 is: 205,311.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,398.34 : 489,260.70 = 136,968.74 : x
  2. Step 2: Convert to fraction form
    326,398.34/489,260.70 = 136,968.74/x
  3. Step 3: Cross multiply
    326,398.34x = 489,260.70 × 136,968.74
  4. Step 4: Simplify right side
    326,398.34x = 67,013,421,610.52
  5. Step 5: Solve for x
    x = 67,013,421,610.52/326,398.34
  6. Step 6: Final answer
    x = 205,311.77

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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.