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Finding the Fourth Proportional to 1,425,682.64, 1,967,442 and 781,127.24

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Solution

The fourth proportional to 1,425,682.64, 1,967,442 and 781,127.24 is: 1,077,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,682.64 : 1,967,442 = 781,127.24 : x
  2. Step 2: Convert to fraction form
    1,425,682.64/1,967,442 = 781,127.24/x
  3. Step 3: Cross multiply
    1,425,682.64x = 1,967,442 × 781,127.24
  4. Step 4: Simplify right side
    1,425,682.64x = 1,536,822,539,320.08
  5. Step 5: Solve for x
    x = 1,536,822,539,320.08/1,425,682.64
  6. Step 6: Final answer
    x = 1,077,955.57

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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.