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Finding the Fourth Proportional to 326,101.80, 489,152.70 and 139,477.80

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Solution

The fourth proportional to 326,101.80, 489,152.70 and 139,477.80 is: 209,216.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,101.80 : 489,152.70 = 139,477.80 : x
  2. Step 2: Convert to fraction form
    326,101.80/489,152.70 = 139,477.80/x
  3. Step 3: Cross multiply
    326,101.80x = 489,152.70 × 139,477.80
  4. Step 4: Simplify right side
    326,101.80x = 68,225,942,460.06
  5. Step 5: Solve for x
    x = 68,225,942,460.06/326,101.80
  6. Step 6: Final answer
    x = 209,216.70

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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.