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Finding the Fourth Proportional to 386,359.65, 533,376.60 and 300,125.43

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Solution

The fourth proportional to 386,359.65, 533,376.60 and 300,125.43 is: 414,328.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,359.65 : 533,376.60 = 300,125.43 : x
  2. Step 2: Convert to fraction form
    386,359.65/533,376.60 = 300,125.43/x
  3. Step 3: Cross multiply
    386,359.65x = 533,376.60 × 300,125.43
  4. Step 4: Simplify right side
    386,359.65x = 160,079,881,426.94
  5. Step 5: Solve for x
    x = 160,079,881,426.94/386,359.65
  6. Step 6: Final answer
    x = 414,328.67

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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.