Home / 1,186,986.42-1,638,039.00-643,136.93

Finding the Fourth Proportional to 1,186,986.42, 1,638,039.00 and 643,136.93

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Solution

The fourth proportional to 1,186,986.42, 1,638,039.00 and 643,136.93 is: 887,527.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,986.42 : 1,638,039.00 = 643,136.93 : x
  2. Step 2: Convert to fraction form
    1,186,986.42/1,638,039.00 = 643,136.93/x
  3. Step 3: Cross multiply
    1,186,986.42x = 1,638,039.00 × 643,136.93
  4. Step 4: Simplify right side
    1,186,986.42x = 1,053,483,380,187.13
  5. Step 5: Solve for x
    x = 1,053,483,380,187.13/1,186,986.42
  6. Step 6: Final answer
    x = 887,527.74

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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.