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Finding the Fourth Proportional to 991,805.80, 1,369,042.98 and 589,393

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Solution

The fourth proportional to 991,805.80, 1,369,042.98 and 589,393 is: 813,570.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,805.80 : 1,369,042.98 = 589,393 : x
  2. Step 2: Convert to fraction form
    991,805.80/1,369,042.98 = 589,393/x
  3. Step 3: Cross multiply
    991,805.80x = 1,369,042.98 × 589,393
  4. Step 4: Simplify right side
    991,805.80x = 806,904,349,111.14
  5. Step 5: Solve for x
    x = 806,904,349,111.14/991,805.80
  6. Step 6: Final answer
    x = 813,570.91

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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.