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Finding the Fourth Proportional to 321,683.20, 482,641.80 and 111,342.40

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Solution

The fourth proportional to 321,683.20, 482,641.80 and 111,342.40 is: 167,054.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,683.20 : 482,641.80 = 111,342.40 : x
  2. Step 2: Convert to fraction form
    321,683.20/482,641.80 = 111,342.40/x
  3. Step 3: Cross multiply
    321,683.20x = 482,641.80 × 111,342.40
  4. Step 4: Simplify right side
    321,683.20x = 53,738,496,352.32
  5. Step 5: Solve for x
    x = 53,738,496,352.32/321,683.20
  6. Step 6: Final answer
    x = 167,054.10

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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.