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Finding the Fourth Proportional to 212,380.80, 318,830.40 and 210,825.60

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Solution

The fourth proportional to 212,380.80, 318,830.40 and 210,825.60 is: 316,495.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,380.80 : 318,830.40 = 210,825.60 : x
  2. Step 2: Convert to fraction form
    212,380.80/318,830.40 = 210,825.60/x
  3. Step 3: Cross multiply
    212,380.80x = 318,830.40 × 210,825.60
  4. Step 4: Simplify right side
    212,380.80x = 67,217,610,378.24
  5. Step 5: Solve for x
    x = 67,217,610,378.24/212,380.80
  6. Step 6: Final answer
    x = 316,495.70

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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.