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Finding the Fourth Proportional to 321,121.01, 442,726.90 and 276,280.67

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Solution

The fourth proportional to 321,121.01, 442,726.90 and 276,280.67 is: 380,905.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,121.01 : 442,726.90 = 276,280.67 : x
  2. Step 2: Convert to fraction form
    321,121.01/442,726.90 = 276,280.67/x
  3. Step 3: Cross multiply
    321,121.01x = 442,726.90 × 276,280.67
  4. Step 4: Simplify right side
    321,121.01x = 122,316,884,559.02
  5. Step 5: Solve for x
    x = 122,316,884,559.02/321,121.01
  6. Step 6: Final answer
    x = 380,905.89

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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.