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Finding the Fourth Proportional to 585,435.56, 807,605.10 and 391,851.50

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Solution

The fourth proportional to 585,435.56, 807,605.10 and 391,851.50 is: 540,556.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,435.56 : 807,605.10 = 391,851.50 : x
  2. Step 2: Convert to fraction form
    585,435.56/807,605.10 = 391,851.50/x
  3. Step 3: Cross multiply
    585,435.56x = 807,605.10 × 391,851.50
  4. Step 4: Simplify right side
    585,435.56x = 316,461,265,804.63
  5. Step 5: Solve for x
    x = 316,461,265,804.63/585,435.56
  6. Step 6: Final answer
    x = 540,556.96

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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.