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Finding the Fourth Proportional to 517,317.09, 775,749.40 and 260,991.94

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Solution

The fourth proportional to 517,317.09, 775,749.40 and 260,991.94 is: 391,373.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,317.09 : 775,749.40 = 260,991.94 : x
  2. Step 2: Convert to fraction form
    517,317.09/775,749.40 = 260,991.94/x
  3. Step 3: Cross multiply
    517,317.09x = 775,749.40 × 260,991.94
  4. Step 4: Simplify right side
    517,317.09x = 202,464,340,859.84
  5. Step 5: Solve for x
    x = 202,464,340,859.84/517,317.09
  6. Step 6: Final answer
    x = 391,373.77

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Similar ratio
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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.