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Finding the Fourth Proportional to 621,874.76, 931,317.32 and 354,825.66

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Solution

The fourth proportional to 621,874.76, 931,317.32 and 354,825.66 is: 531,385.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,874.76 : 931,317.32 = 354,825.66 : x
  2. Step 2: Convert to fraction form
    621,874.76/931,317.32 = 354,825.66/x
  3. Step 3: Cross multiply
    621,874.76x = 931,317.32 × 354,825.66
  4. Step 4: Simplify right side
    621,874.76x = 330,455,280,964.30
  5. Step 5: Solve for x
    x = 330,455,280,964.30/621,874.76
  6. Step 6: Final answer
    x = 531,385.59

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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.