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Finding the Fourth Proportional to 1,385,784, 1,912,387.68 and 749,880

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Solution

The fourth proportional to 1,385,784, 1,912,387.68 and 749,880 is: 1,034,837.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,784 : 1,912,387.68 = 749,880 : x
  2. Step 2: Convert to fraction form
    1,385,784/1,912,387.68 = 749,880/x
  3. Step 3: Cross multiply
    1,385,784x = 1,912,387.68 × 749,880
  4. Step 4: Simplify right side
    1,385,784x = 1,434,061,273,478.40
  5. Step 5: Solve for x
    x = 1,434,061,273,478.40/1,385,784
  6. Step 6: Final answer
    x = 1,034,837.52

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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.