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Finding the Fourth Proportional to 212,580.40, 318,783.12 and 168,315.52

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Solution

The fourth proportional to 212,580.40, 318,783.12 and 168,315.52 is: 252,404.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,580.40 : 318,783.12 = 168,315.52 : x
  2. Step 2: Convert to fraction form
    212,580.40/318,783.12 = 168,315.52/x
  3. Step 3: Cross multiply
    212,580.40x = 318,783.12 × 168,315.52
  4. Step 4: Simplify right side
    212,580.40x = 53,656,146,610.02
  5. Step 5: Solve for x
    x = 53,656,146,610.02/212,580.40
  6. Step 6: Final answer
    x = 252,404.02

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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.