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Finding the Fourth Proportional to 516,916.48, 776,260.44 and 280,720.48

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Solution

The fourth proportional to 516,916.48, 776,260.44 and 280,720.48 is: 421,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,916.48 : 776,260.44 = 280,720.48 : x
  2. Step 2: Convert to fraction form
    516,916.48/776,260.44 = 280,720.48/x
  3. Step 3: Cross multiply
    516,916.48x = 776,260.44 × 280,720.48
  4. Step 4: Simplify right side
    516,916.48x = 217,912,203,321.81
  5. Step 5: Solve for x
    x = 217,912,203,321.81/516,916.48
  6. Step 6: Final answer
    x = 421,561.73

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1.5x scale

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.