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Finding the Fourth Proportional to 309,165.84, 426,626.60 and 173,176.79

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Solution

The fourth proportional to 309,165.84, 426,626.60 and 173,176.79 is: 238,971.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,165.84 : 426,626.60 = 173,176.79 : x
  2. Step 2: Convert to fraction form
    309,165.84/426,626.60 = 173,176.79/x
  3. Step 3: Cross multiply
    309,165.84x = 426,626.60 × 173,176.79
  4. Step 4: Simplify right side
    309,165.84x = 73,881,822,117.60
  5. Step 5: Solve for x
    x = 73,881,822,117.60/309,165.84
  6. Step 6: Final answer
    x = 238,971.49

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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.