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Finding the Fourth Proportional to 309,618.72, 426,841.92 and 207,662.40

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Solution

The fourth proportional to 309,618.72, 426,841.92 and 207,662.40 is: 286,284.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,618.72 : 426,841.92 = 207,662.40 : x
  2. Step 2: Convert to fraction form
    309,618.72/426,841.92 = 207,662.40/x
  3. Step 3: Cross multiply
    309,618.72x = 426,841.92 × 207,662.40
  4. Step 4: Simplify right side
    309,618.72x = 88,639,017,527.81
  5. Step 5: Solve for x
    x = 88,639,017,527.81/309,618.72
  6. Step 6: Final answer
    x = 286,284.43

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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.