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Finding the Fourth Proportional to 708,907.67, 978,350.82 and 403,080.02

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Solution

The fourth proportional to 708,907.67, 978,350.82 and 403,080.02 is: 556,283.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,907.67 : 978,350.82 = 403,080.02 : x
  2. Step 2: Convert to fraction form
    708,907.67/978,350.82 = 403,080.02/x
  3. Step 3: Cross multiply
    708,907.67x = 978,350.82 × 403,080.02
  4. Step 4: Simplify right side
    708,907.67x = 394,353,668,092.62
  5. Step 5: Solve for x
    x = 394,353,668,092.62/708,907.67
  6. Step 6: Final answer
    x = 556,283.54

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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.