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Finding the Fourth Proportional to 520,560.12, 780,917.94 and 165,585.72

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Solution

The fourth proportional to 520,560.12, 780,917.94 and 165,585.72 is: 248,403.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,560.12 : 780,917.94 = 165,585.72 : x
  2. Step 2: Convert to fraction form
    520,560.12/780,917.94 = 165,585.72/x
  3. Step 3: Cross multiply
    520,560.12x = 780,917.94 × 165,585.72
  4. Step 4: Simplify right side
    520,560.12x = 129,308,859,355.82
  5. Step 5: Solve for x
    x = 129,308,859,355.82/520,560.12
  6. Step 6: Final answer
    x = 248,403.31

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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.