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Finding the Fourth Proportional to 228,674.95, 315,470.91 and 137,980.33

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Solution

The fourth proportional to 228,674.95, 315,470.91 and 137,980.33 is: 190,352.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,674.95 : 315,470.91 = 137,980.33 : x
  2. Step 2: Convert to fraction form
    228,674.95/315,470.91 = 137,980.33/x
  3. Step 3: Cross multiply
    228,674.95x = 315,470.91 × 137,980.33
  4. Step 4: Simplify right side
    228,674.95x = 43,528,780,267.20
  5. Step 5: Solve for x
    x = 43,528,780,267.20/228,674.95
  6. Step 6: Final answer
    x = 190,352.20

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1.5x scale

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.