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Finding the Fourth Proportional to 328,076.80, 492,089.60 and 128,358.40

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Solution

The fourth proportional to 328,076.80, 492,089.60 and 128,358.40 is: 192,527.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,076.80 : 492,089.60 = 128,358.40 : x
  2. Step 2: Convert to fraction form
    328,076.80/492,089.60 = 128,358.40/x
  3. Step 3: Cross multiply
    328,076.80x = 492,089.60 × 128,358.40
  4. Step 4: Simplify right side
    328,076.80x = 63,163,833,712.64
  5. Step 5: Solve for x
    x = 63,163,833,712.64/328,076.80
  6. Step 6: Final answer
    x = 192,527.58

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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.