Home / 1,290,698.97-1,781,168.12-709,981.57

Finding the Fourth Proportional to 1,290,698.97, 1,781,168.12 and 709,981.57

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Solution

The fourth proportional to 1,290,698.97, 1,781,168.12 and 709,981.57 is: 979,776.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,698.97 : 1,781,168.12 = 709,981.57 : x
  2. Step 2: Convert to fraction form
    1,290,698.97/1,781,168.12 = 709,981.57/x
  3. Step 3: Cross multiply
    1,290,698.97x = 1,781,168.12 × 709,981.57
  4. Step 4: Simplify right side
    1,290,698.97x = 1,264,596,538,271.55
  5. Step 5: Solve for x
    x = 1,264,596,538,271.55/1,290,698.97
  6. Step 6: Final answer
    x = 979,776.51

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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.