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Finding the Fourth Proportional to 520,119, 717,764.22 and 281,655

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Solution

The fourth proportional to 520,119, 717,764.22 and 281,655 is: 388,683.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,119 : 717,764.22 = 281,655 : x
  2. Step 2: Convert to fraction form
    520,119/717,764.22 = 281,655/x
  3. Step 3: Cross multiply
    520,119x = 717,764.22 × 281,655
  4. Step 4: Simplify right side
    520,119x = 202,161,881,384.10
  5. Step 5: Solve for x
    x = 202,161,881,384.10/520,119
  6. Step 6: Final answer
    x = 388,683.90

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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.