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Finding the Fourth Proportional to 1,375,554, 1,898,439.48 and 771,942

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Solution

The fourth proportional to 1,375,554, 1,898,439.48 and 771,942 is: 1,065,378.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,554 : 1,898,439.48 = 771,942 : x
  2. Step 2: Convert to fraction form
    1,375,554/1,898,439.48 = 771,942/x
  3. Step 3: Cross multiply
    1,375,554x = 1,898,439.48 × 771,942
  4. Step 4: Simplify right side
    1,375,554x = 1,465,485,169,070.16
  5. Step 5: Solve for x
    x = 1,465,485,169,070.16/1,375,554
  6. Step 6: Final answer
    x = 1,065,378.15

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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.