Home / 1,287,421.84-1,776,231.12-743,485.78

Finding the Fourth Proportional to 1,287,421.84, 1,776,231.12 and 743,485.78

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Solution

The fourth proportional to 1,287,421.84, 1,776,231.12 and 743,485.78 is: 1,025,773.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,421.84 : 1,776,231.12 = 743,485.78 : x
  2. Step 2: Convert to fraction form
    1,287,421.84/1,776,231.12 = 743,485.78/x
  3. Step 3: Cross multiply
    1,287,421.84x = 1,776,231.12 × 743,485.78
  4. Step 4: Simplify right side
    1,287,421.84x = 1,320,602,579,713.47
  5. Step 5: Solve for x
    x = 1,320,602,579,713.47/1,287,421.84
  6. Step 6: Final answer
    x = 1,025,773.01

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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.