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Finding the Fourth Proportional to 212,391.62, 318,587.55 and 145,629.34

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Solution

The fourth proportional to 212,391.62, 318,587.55 and 145,629.34 is: 218,444.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,391.62 : 318,587.55 = 145,629.34 : x
  2. Step 2: Convert to fraction form
    212,391.62/318,587.55 = 145,629.34/x
  3. Step 3: Cross multiply
    212,391.62x = 318,587.55 × 145,629.34
  4. Step 4: Simplify right side
    212,391.62x = 46,395,694,848.12
  5. Step 5: Solve for x
    x = 46,395,694,848.12/212,391.62
  6. Step 6: Final answer
    x = 218,444.10

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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.