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Finding the Fourth Proportional to 520,166.01, 780,276 and 165,207.81

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Solution

The fourth proportional to 520,166.01, 780,276 and 165,207.81 is: 247,820.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,166.01 : 780,276 = 165,207.81 : x
  2. Step 2: Convert to fraction form
    520,166.01/780,276 = 165,207.81/x
  3. Step 3: Cross multiply
    520,166.01x = 780,276 × 165,207.81
  4. Step 4: Simplify right side
    520,166.01x = 128,907,689,155.56
  5. Step 5: Solve for x
    x = 128,907,689,155.56/520,166.01
  6. Step 6: Final answer
    x = 247,820.29

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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.