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Finding the Fourth Proportional to 312,310.65, 430,988.83 and 169,070.69

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Solution

The fourth proportional to 312,310.65, 430,988.83 and 169,070.69 is: 233,317.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,310.65 : 430,988.83 = 169,070.69 : x
  2. Step 2: Convert to fraction form
    312,310.65/430,988.83 = 169,070.69/x
  3. Step 3: Cross multiply
    312,310.65x = 430,988.83 × 169,070.69
  4. Step 4: Simplify right side
    312,310.65x = 72,867,578,870.39
  5. Step 5: Solve for x
    x = 72,867,578,870.39/312,310.65
  6. Step 6: Final answer
    x = 233,317.62

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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.