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Finding the Fourth Proportional to 621,137.20, 931,792.20 and 266,148.40

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Solution

The fourth proportional to 621,137.20, 931,792.20 and 266,148.40 is: 399,259.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,137.20 : 931,792.20 = 266,148.40 : x
  2. Step 2: Convert to fraction form
    621,137.20/931,792.20 = 266,148.40/x
  3. Step 3: Cross multiply
    621,137.20x = 931,792.20 × 266,148.40
  4. Step 4: Simplify right side
    621,137.20x = 247,995,003,162.48
  5. Step 5: Solve for x
    x = 247,995,003,162.48/621,137.20
  6. Step 6: Final answer
    x = 399,259.62

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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.