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Finding the Fourth Proportional to 520,756.81, 718,610.46 and 291,274.36

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Solution

The fourth proportional to 520,756.81, 718,610.46 and 291,274.36 is: 401,939.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,756.81 : 718,610.46 = 291,274.36 : x
  2. Step 2: Convert to fraction form
    520,756.81/718,610.46 = 291,274.36/x
  3. Step 3: Cross multiply
    520,756.81x = 718,610.46 × 291,274.36
  4. Step 4: Simplify right side
    520,756.81x = 209,312,801,825.81
  5. Step 5: Solve for x
    x = 209,312,801,825.81/520,756.81
  6. Step 6: Final answer
    x = 401,939.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.