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Finding the Fourth Proportional to 715,090.67, 986,584.21 and 404,950.78

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Solution

The fourth proportional to 715,090.67, 986,584.21 and 404,950.78 is: 558,695.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,090.67 : 986,584.21 = 404,950.78 : x
  2. Step 2: Convert to fraction form
    715,090.67/986,584.21 = 404,950.78/x
  3. Step 3: Cross multiply
    715,090.67x = 986,584.21 × 404,950.78
  4. Step 4: Simplify right side
    715,090.67x = 399,518,045,375.18
  5. Step 5: Solve for x
    x = 399,518,045,375.18/715,090.67
  6. Step 6: Final answer
    x = 558,695.65

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1.5x scale

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.