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Finding the Fourth Proportional to 321,316.19, 443,315.01 and 185,331.90

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Solution

The fourth proportional to 321,316.19, 443,315.01 and 185,331.90 is: 255,699.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,316.19 : 443,315.01 = 185,331.90 : x
  2. Step 2: Convert to fraction form
    321,316.19/443,315.01 = 185,331.90/x
  3. Step 3: Cross multiply
    321,316.19x = 443,315.01 × 185,331.90
  4. Step 4: Simplify right side
    321,316.19x = 82,160,413,101.82
  5. Step 5: Solve for x
    x = 82,160,413,101.82/321,316.19
  6. Step 6: Final answer
    x = 255,699.58

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1.5x scale

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.