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Finding the Fourth Proportional to 326,037.80, 489,056.70 and 136,465.40

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Solution

The fourth proportional to 326,037.80, 489,056.70 and 136,465.40 is: 204,698.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,037.80 : 489,056.70 = 136,465.40 : x
  2. Step 2: Convert to fraction form
    326,037.80/489,056.70 = 136,465.40/x
  3. Step 3: Cross multiply
    326,037.80x = 489,056.70 × 136,465.40
  4. Step 4: Simplify right side
    326,037.80x = 66,739,318,188.18
  5. Step 5: Solve for x
    x = 66,739,318,188.18/326,037.80
  6. Step 6: Final answer
    x = 204,698.10

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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.