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Finding the Fourth Proportional to 309,178.60, 426,569.62 and 173,194.18

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Solution

The fourth proportional to 309,178.60, 426,569.62 and 173,194.18 is: 238,953.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,178.60 : 426,569.62 = 173,194.18 : x
  2. Step 2: Convert to fraction form
    309,178.60/426,569.62 = 173,194.18/x
  3. Step 3: Cross multiply
    309,178.60x = 426,569.62 × 173,194.18
  4. Step 4: Simplify right side
    309,178.60x = 73,879,375,548.81
  5. Step 5: Solve for x
    x = 73,879,375,548.81/309,178.60
  6. Step 6: Final answer
    x = 238,953.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.