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Finding the Fourth Proportional to 326,525.80, 489,788.70 and 139,901.80

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Solution

The fourth proportional to 326,525.80, 489,788.70 and 139,901.80 is: 209,852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,525.80 : 489,788.70 = 139,901.80 : x
  2. Step 2: Convert to fraction form
    326,525.80/489,788.70 = 139,901.80/x
  3. Step 3: Cross multiply
    326,525.80x = 489,788.70 × 139,901.80
  4. Step 4: Simplify right side
    326,525.80x = 68,522,320,749.66
  5. Step 5: Solve for x
    x = 68,522,320,749.66/326,525.80
  6. Step 6: Final answer
    x = 209,852.70

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1.5x scale

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.