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Finding the Fourth Proportional to 321,309.05, 443,411.35 and 176,113.71

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Solution

The fourth proportional to 321,309.05, 443,411.35 and 176,113.71 is: 243,039.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,309.05 : 443,411.35 = 176,113.71 : x
  2. Step 2: Convert to fraction form
    321,309.05/443,411.35 = 176,113.71/x
  3. Step 3: Cross multiply
    321,309.05x = 443,411.35 × 176,113.71
  4. Step 4: Simplify right side
    321,309.05x = 78,090,817,464.32
  5. Step 5: Solve for x
    x = 78,090,817,464.32/321,309.05
  6. Step 6: Final answer
    x = 243,039.59

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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.