Home / 1,209,405.66-1,668,421.44-779,823.78

Finding the Fourth Proportional to 1,209,405.66, 1,668,421.44 and 779,823.78

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Solution

The fourth proportional to 1,209,405.66, 1,668,421.44 and 779,823.78 is: 1,075,796.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,405.66 : 1,668,421.44 = 779,823.78 : x
  2. Step 2: Convert to fraction form
    1,209,405.66/1,668,421.44 = 779,823.78/x
  3. Step 3: Cross multiply
    1,209,405.66x = 1,668,421.44 × 779,823.78
  4. Step 4: Simplify right side
    1,209,405.66x = 1,301,074,713,973.84
  5. Step 5: Solve for x
    x = 1,301,074,713,973.84/1,209,405.66
  6. Step 6: Final answer
    x = 1,075,796.78

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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.