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Finding the Fourth Proportional to 978,928.80, 1,468,928.40 and 379,913.76

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Solution

The fourth proportional to 978,928.80, 1,468,928.40 and 379,913.76 is: 570,078.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,928.80 : 1,468,928.40 = 379,913.76 : x
  2. Step 2: Convert to fraction form
    978,928.80/1,468,928.40 = 379,913.76/x
  3. Step 3: Cross multiply
    978,928.80x = 1,468,928.40 × 379,913.76
  4. Step 4: Simplify right side
    978,928.80x = 558,066,111,614.78
  5. Step 5: Solve for x
    x = 558,066,111,614.78/978,928.80
  6. Step 6: Final answer
    x = 570,078.35

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.