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Finding the Fourth Proportional to 1,351,783.59, 1,865,508.71 and 739,936.74

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Solution

The fourth proportional to 1,351,783.59, 1,865,508.71 and 739,936.74 is: 1,021,138.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,783.59 : 1,865,508.71 = 739,936.74 : x
  2. Step 2: Convert to fraction form
    1,351,783.59/1,865,508.71 = 739,936.74/x
  3. Step 3: Cross multiply
    1,351,783.59x = 1,865,508.71 × 739,936.74
  4. Step 4: Simplify right side
    1,351,783.59x = 1,380,358,426,121.49
  5. Step 5: Solve for x
    x = 1,380,358,426,121.49/1,351,783.59
  6. Step 6: Final answer
    x = 1,021,138.62

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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.