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Finding the Fourth Proportional to 212,606.80, 318,910.20 and 162,840.40

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Solution

The fourth proportional to 212,606.80, 318,910.20 and 162,840.40 is: 244,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,606.80 : 318,910.20 = 162,840.40 : x
  2. Step 2: Convert to fraction form
    212,606.80/318,910.20 = 162,840.40/x
  3. Step 3: Cross multiply
    212,606.80x = 318,910.20 × 162,840.40
  4. Step 4: Simplify right side
    212,606.80x = 51,931,464,532.08
  5. Step 5: Solve for x
    x = 51,931,464,532.08/212,606.80
  6. Step 6: Final answer
    x = 244,260.60

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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.