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Finding the Fourth Proportional to 621,874.50, 931,316.92 and 354,825.40

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Solution

The fourth proportional to 621,874.50, 931,316.92 and 354,825.40 is: 531,385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,874.50 : 931,316.92 = 354,825.40 : x
  2. Step 2: Convert to fraction form
    621,874.50/931,316.92 = 354,825.40/x
  3. Step 3: Cross multiply
    621,874.50x = 931,316.92 × 354,825.40
  4. Step 4: Simplify right side
    621,874.50x = 330,454,898,665.77
  5. Step 5: Solve for x
    x = 330,454,898,665.77/621,874.50
  6. Step 6: Final answer
    x = 531,385.19

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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.