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Finding the Fourth Proportional to 217,369.40, 326,054.10 and 142,719.80

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Solution

The fourth proportional to 217,369.40, 326,054.10 and 142,719.80 is: 214,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,369.40 : 326,054.10 = 142,719.80 : x
  2. Step 2: Convert to fraction form
    217,369.40/326,054.10 = 142,719.80/x
  3. Step 3: Cross multiply
    217,369.40x = 326,054.10 × 142,719.80
  4. Step 4: Simplify right side
    217,369.40x = 46,534,375,941.18
  5. Step 5: Solve for x
    x = 46,534,375,941.18/217,369.40
  6. Step 6: Final answer
    x = 214,079.70

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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.