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Finding the Fourth Proportional to 326,555.84, 489,459.14 and 136,981.15

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Solution

The fourth proportional to 326,555.84, 489,459.14 and 136,981.15 is: 205,314.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,555.84 : 489,459.14 = 136,981.15 : x
  2. Step 2: Convert to fraction form
    326,555.84/489,459.14 = 136,981.15/x
  3. Step 3: Cross multiply
    326,555.84x = 489,459.14 × 136,981.15
  4. Step 4: Simplify right side
    326,555.84x = 67,046,674,480.34
  5. Step 5: Solve for x
    x = 67,046,674,480.34/326,555.84
  6. Step 6: Final answer
    x = 205,314.58

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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.