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Finding the Fourth Proportional to 715,138, 1,072,690.38 and 360,056.68

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Solution

The fourth proportional to 715,138, 1,072,690.38 and 360,056.68 is: 540,076.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,138 : 1,072,690.38 = 360,056.68 : x
  2. Step 2: Convert to fraction form
    715,138/1,072,690.38 = 360,056.68/x
  3. Step 3: Cross multiply
    715,138x = 1,072,690.38 × 360,056.68
  4. Step 4: Simplify right side
    715,138x = 386,229,336,890.74
  5. Step 5: Solve for x
    x = 386,229,336,890.74/715,138
  6. Step 6: Final answer
    x = 540,076.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.