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Finding the Fourth Proportional to 692,718.82, 955,968.19 and 386,784.86

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Solution

The fourth proportional to 692,718.82, 955,968.19 and 386,784.86 is: 533,772.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,718.82 : 955,968.19 = 386,784.86 : x
  2. Step 2: Convert to fraction form
    692,718.82/955,968.19 = 386,784.86/x
  3. Step 3: Cross multiply
    692,718.82x = 955,968.19 × 386,784.86
  4. Step 4: Simplify right side
    692,718.82x = 369,754,016,786.80
  5. Step 5: Solve for x
    x = 369,754,016,786.80/692,718.82
  6. Step 6: Final answer
    x = 533,772.16

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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.