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Finding the Fourth Proportional to 921,638, 1,271,860.44 and 497,702

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Solution

The fourth proportional to 921,638, 1,271,860.44 and 497,702 is: 686,828.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,638 : 1,271,860.44 = 497,702 : x
  2. Step 2: Convert to fraction form
    921,638/1,271,860.44 = 497,702/x
  3. Step 3: Cross multiply
    921,638x = 1,271,860.44 × 497,702
  4. Step 4: Simplify right side
    921,638x = 633,007,484,708.88
  5. Step 5: Solve for x
    x = 633,007,484,708.88/921,638
  6. Step 6: Final answer
    x = 686,828.76

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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.