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Finding the Fourth Proportional to 509,403.33, 702,979.97 and 318,528.45

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Solution

The fourth proportional to 509,403.33, 702,979.97 and 318,528.45 is: 439,571.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,403.33 : 702,979.97 = 318,528.45 : x
  2. Step 2: Convert to fraction form
    509,403.33/702,979.97 = 318,528.45/x
  3. Step 3: Cross multiply
    509,403.33x = 702,979.97 × 318,528.45
  4. Step 4: Simplify right side
    509,403.33x = 223,919,118,632.50
  5. Step 5: Solve for x
    x = 223,919,118,632.50/509,403.33
  6. Step 6: Final answer
    x = 439,571.37

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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.