Home / 1,290,759.60-1,781,075.48-717,689.46

Finding the Fourth Proportional to 1,290,759.60, 1,781,075.48 and 717,689.46

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Solution

The fourth proportional to 1,290,759.60, 1,781,075.48 and 717,689.46 is: 990,315.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,759.60 : 1,781,075.48 = 717,689.46 : x
  2. Step 2: Convert to fraction form
    1,290,759.60/1,781,075.48 = 717,689.46/x
  3. Step 3: Cross multiply
    1,290,759.60x = 1,781,075.48 × 717,689.46
  4. Step 4: Simplify right side
    1,290,759.60x = 1,278,259,095,871.99
  5. Step 5: Solve for x
    x = 1,278,259,095,871.99/1,290,759.60
  6. Step 6: Final answer
    x = 990,315.39

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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.