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Finding the Fourth Proportional to 228,816, 315,766.08 and 128,246.40

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Solution

The fourth proportional to 228,816, 315,766.08 and 128,246.40 is: 176,980.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,816 : 315,766.08 = 128,246.40 : x
  2. Step 2: Convert to fraction form
    228,816/315,766.08 = 128,246.40/x
  3. Step 3: Cross multiply
    228,816x = 315,766.08 × 128,246.40
  4. Step 4: Simplify right side
    228,816x = 40,495,863,002.11
  5. Step 5: Solve for x
    x = 40,495,863,002.11/228,816
  6. Step 6: Final answer
    x = 176,980.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.