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Finding the Fourth Proportional to 309,311.68, 426,880.08 and 173,368.72

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Solution

The fourth proportional to 309,311.68, 426,880.08 and 173,368.72 is: 239,265.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,311.68 : 426,880.08 = 173,368.72 : x
  2. Step 2: Convert to fraction form
    309,311.68/426,880.08 = 173,368.72/x
  3. Step 3: Cross multiply
    309,311.68x = 426,880.08 × 173,368.72
  4. Step 4: Simplify right side
    309,311.68x = 74,007,653,063.10
  5. Step 5: Solve for x
    x = 74,007,653,063.10/309,311.68
  6. Step 6: Final answer
    x = 239,265.63

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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.