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Finding the Fourth Proportional to 712,571.55, 983,338.77 and 406,744.89

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Solution

The fourth proportional to 712,571.55, 983,338.77 and 406,744.89 is: 561,302.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,571.55 : 983,338.77 = 406,744.89 : x
  2. Step 2: Convert to fraction form
    712,571.55/983,338.77 = 406,744.89/x
  3. Step 3: Cross multiply
    712,571.55x = 983,338.77 × 406,744.89
  4. Step 4: Simplify right side
    712,571.55x = 399,968,019,836.39
  5. Step 5: Solve for x
    x = 399,968,019,836.39/712,571.55
  6. Step 6: Final answer
    x = 561,302.26

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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.