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Finding the Fourth Proportional to 520,754.81, 718,607.70 and 291,272.36

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Solution

The fourth proportional to 520,754.81, 718,607.70 and 291,272.36 is: 401,936.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,754.81 : 718,607.70 = 291,272.36 : x
  2. Step 2: Convert to fraction form
    520,754.81/718,607.70 = 291,272.36/x
  3. Step 3: Cross multiply
    520,754.81x = 718,607.70 × 291,272.36
  4. Step 4: Simplify right side
    520,754.81x = 209,310,560,693.17
  5. Step 5: Solve for x
    x = 209,310,560,693.17/520,754.81
  6. Step 6: Final answer
    x = 401,936.87

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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.