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Finding the Fourth Proportional to 520,665.74, 718,585.26 and 291,235.77

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Solution

The fourth proportional to 520,665.74, 718,585.26 and 291,235.77 is: 401,942.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,665.74 : 718,585.26 = 291,235.77 : x
  2. Step 2: Convert to fraction form
    520,665.74/718,585.26 = 291,235.77/x
  3. Step 3: Cross multiply
    520,665.74x = 718,585.26 × 291,235.77
  4. Step 4: Simplify right side
    520,665.74x = 209,277,731,506.75
  5. Step 5: Solve for x
    x = 209,277,731,506.75/520,665.74
  6. Step 6: Final answer
    x = 401,942.58

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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.