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Finding the Fourth Proportional to 621,278.83, 930,700.32 and 321,955.75

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Solution

The fourth proportional to 621,278.83, 930,700.32 and 321,955.75 is: 482,302.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,278.83 : 930,700.32 = 321,955.75 : x
  2. Step 2: Convert to fraction form
    621,278.83/930,700.32 = 321,955.75/x
  3. Step 3: Cross multiply
    621,278.83x = 930,700.32 × 321,955.75
  4. Step 4: Simplify right side
    621,278.83x = 299,644,319,550.84
  5. Step 5: Solve for x
    x = 299,644,319,550.84/621,278.83
  6. Step 6: Final answer
    x = 482,302.48

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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.