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Finding the Fourth Proportional to 921,636, 1,271,857.68 and 497,700

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Solution

The fourth proportional to 921,636, 1,271,857.68 and 497,700 is: 686,826

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,636 : 1,271,857.68 = 497,700 : x
  2. Step 2: Convert to fraction form
    921,636/1,271,857.68 = 497,700/x
  3. Step 3: Cross multiply
    921,636x = 1,271,857.68 × 497,700
  4. Step 4: Simplify right side
    921,636x = 633,003,567,336
  5. Step 5: Solve for x
    x = 633,003,567,336/921,636
  6. Step 6: Final answer
    x = 686,826

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.