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Finding the Fourth Proportional to 716,039.54, 988,141.71 and 393,751.94

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Solution

The fourth proportional to 716,039.54, 988,141.71 and 393,751.94 is: 543,381.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,039.54 : 988,141.71 = 393,751.94 : x
  2. Step 2: Convert to fraction form
    716,039.54/988,141.71 = 393,751.94/x
  3. Step 3: Cross multiply
    716,039.54x = 988,141.71 × 393,751.94
  4. Step 4: Simplify right side
    716,039.54x = 389,082,715,307.42
  5. Step 5: Solve for x
    x = 389,082,715,307.42/716,039.54
  6. Step 6: Final answer
    x = 543,381.61

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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.