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Finding the Fourth Proportional to 326,534.60, 489,145.80 and 186,129.20

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Solution

The fourth proportional to 326,534.60, 489,145.80 and 186,129.20 is: 278,819.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,534.60 : 489,145.80 = 186,129.20 : x
  2. Step 2: Convert to fraction form
    326,534.60/489,145.80 = 186,129.20/x
  3. Step 3: Cross multiply
    326,534.60x = 489,145.80 × 186,129.20
  4. Step 4: Simplify right side
    326,534.60x = 91,044,316,437.36
  5. Step 5: Solve for x
    x = 91,044,316,437.36/326,534.60
  6. Step 6: Final answer
    x = 278,819.81

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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.