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Finding the Fourth Proportional to 1,385,860, 1,912,487.76 and 749,956

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Solution

The fourth proportional to 1,385,860, 1,912,487.76 and 749,956 is: 1,034,939.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,860 : 1,912,487.76 = 749,956 : x
  2. Step 2: Convert to fraction form
    1,385,860/1,912,487.76 = 749,956/x
  3. Step 3: Cross multiply
    1,385,860x = 1,912,487.76 × 749,956
  4. Step 4: Simplify right side
    1,385,860x = 1,434,281,670,538.56
  5. Step 5: Solve for x
    x = 1,434,281,670,538.56/1,385,860
  6. Step 6: Final answer
    x = 1,034,939.80

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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.