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Finding the Fourth Proportional to 403,395.50, 556,838.09 and 317,129.42

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Solution

The fourth proportional to 403,395.50, 556,838.09 and 317,129.42 is: 437,758.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,395.50 : 556,838.09 = 317,129.42 : x
  2. Step 2: Convert to fraction form
    403,395.50/556,838.09 = 317,129.42/x
  3. Step 3: Cross multiply
    403,395.50x = 556,838.09 × 317,129.42
  4. Step 4: Simplify right side
    403,395.50x = 176,589,738,929.96
  5. Step 5: Solve for x
    x = 176,589,738,929.96/403,395.50
  6. Step 6: Final answer
    x = 437,758.33

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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.