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Finding the Fourth Proportional to 573,130.79, 790,891.63 and 318,476.51

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Solution

The fourth proportional to 573,130.79, 790,891.63 and 318,476.51 is: 439,481.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,130.79 : 790,891.63 = 318,476.51 : x
  2. Step 2: Convert to fraction form
    573,130.79/790,891.63 = 318,476.51/x
  3. Step 3: Cross multiply
    573,130.79x = 790,891.63 × 318,476.51
  4. Step 4: Simplify right side
    573,130.79x = 251,880,404,325.81
  5. Step 5: Solve for x
    x = 251,880,404,325.81/573,130.79
  6. Step 6: Final answer
    x = 439,481.54

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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.