Home / 642,136.40-886,146.04-355,656.41

Finding the Fourth Proportional to 642,136.40, 886,146.04 and 355,656.41

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Solution

The fourth proportional to 642,136.40, 886,146.04 and 355,656.41 is: 490,804.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,136.40 : 886,146.04 = 355,656.41 : x
  2. Step 2: Convert to fraction form
    642,136.40/886,146.04 = 355,656.41/x
  3. Step 3: Cross multiply
    642,136.40x = 886,146.04 × 355,656.41
  4. Step 4: Simplify right side
    642,136.40x = 315,163,519,322.12
  5. Step 5: Solve for x
    x = 315,163,519,322.12/642,136.40
  6. Step 6: Final answer
    x = 490,804.63

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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.