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Finding the Fourth Proportional to 343,775.77, 515,136.21 and 143,986.84

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Solution

The fourth proportional to 343,775.77, 515,136.21 and 143,986.84 is: 215,759.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,775.77 : 515,136.21 = 143,986.84 : x
  2. Step 2: Convert to fraction form
    343,775.77/515,136.21 = 143,986.84/x
  3. Step 3: Cross multiply
    343,775.77x = 515,136.21 × 143,986.84
  4. Step 4: Simplify right side
    343,775.77x = 74,172,835,047.48
  5. Step 5: Solve for x
    x = 74,172,835,047.48/343,775.77
  6. Step 6: Final answer
    x = 215,759.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.