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Finding the Fourth Proportional to 661,570.58, 991,436.52 and 345,396.80

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Solution

The fourth proportional to 661,570.58, 991,436.52 and 345,396.80 is: 517,615.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,570.58 : 991,436.52 = 345,396.80 : x
  2. Step 2: Convert to fraction form
    661,570.58/991,436.52 = 345,396.80/x
  3. Step 3: Cross multiply
    661,570.58x = 991,436.52 × 345,396.80
  4. Step 4: Simplify right side
    661,570.58x = 342,439,001,411.14
  5. Step 5: Solve for x
    x = 342,439,001,411.14/661,570.58
  6. Step 6: Final answer
    x = 517,615.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.