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Finding the Fourth Proportional to 1,262,786.88, 1,742,766 and 689,913.12

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Solution

The fourth proportional to 1,262,786.88, 1,742,766 and 689,913.12 is: 952,145.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262,786.88 : 1,742,766 = 689,913.12 : x
  2. Step 2: Convert to fraction form
    1,262,786.88/1,742,766 = 689,913.12/x
  3. Step 3: Cross multiply
    1,262,786.88x = 1,742,766 × 689,913.12
  4. Step 4: Simplify right side
    1,262,786.88x = 1,202,357,128,489.92
  5. Step 5: Solve for x
    x = 1,202,357,128,489.92/1,262,786.88
  6. Step 6: Final answer
    x = 952,145.72

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1.5x scale

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.