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Finding the Fourth Proportional to 390,834.65, 538,923.51 and 254,615.99

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Solution

The fourth proportional to 390,834.65, 538,923.51 and 254,615.99 is: 351,091.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,834.65 : 538,923.51 = 254,615.99 : x
  2. Step 2: Convert to fraction form
    390,834.65/538,923.51 = 254,615.99/x
  3. Step 3: Cross multiply
    390,834.65x = 538,923.51 × 254,615.99
  4. Step 4: Simplify right side
    390,834.65x = 137,218,540,338.31
  5. Step 5: Solve for x
    x = 137,218,540,338.31/390,834.65
  6. Step 6: Final answer
    x = 351,091.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.