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Finding the Fourth Proportional to 580,128.84, 800,565.33 and 321,990.69

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Solution

The fourth proportional to 580,128.84, 800,565.33 and 321,990.69 is: 444,340.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,128.84 : 800,565.33 = 321,990.69 : x
  2. Step 2: Convert to fraction form
    580,128.84/800,565.33 = 321,990.69/x
  3. Step 3: Cross multiply
    580,128.84x = 800,565.33 × 321,990.69
  4. Step 4: Simplify right side
    580,128.84x = 257,774,582,996.78
  5. Step 5: Solve for x
    x = 257,774,582,996.78/580,128.84
  6. Step 6: Final answer
    x = 444,340.23

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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.