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Finding the Fourth Proportional to 312,730.28, 431,566.08 and 169,488.80

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Solution

The fourth proportional to 312,730.28, 431,566.08 and 169,488.80 is: 233,893.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,730.28 : 431,566.08 = 169,488.80 : x
  2. Step 2: Convert to fraction form
    312,730.28/431,566.08 = 169,488.80/x
  3. Step 3: Cross multiply
    312,730.28x = 431,566.08 × 169,488.80
  4. Step 4: Simplify right side
    312,730.28x = 73,145,617,019.90
  5. Step 5: Solve for x
    x = 73,145,617,019.90/312,730.28
  6. Step 6: Final answer
    x = 233,893.62

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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.