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Finding the Fourth Proportional to 715,847.64, 987,870.38 and 393,563.22

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Solution

The fourth proportional to 715,847.64, 987,870.38 and 393,563.22 is: 543,117.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,847.64 : 987,870.38 = 393,563.22 : x
  2. Step 2: Convert to fraction form
    715,847.64/987,870.38 = 393,563.22/x
  3. Step 3: Cross multiply
    715,847.64x = 987,870.38 × 393,563.22
  4. Step 4: Simplify right side
    715,847.64x = 388,789,445,727.61
  5. Step 5: Solve for x
    x = 388,789,445,727.61/715,847.64
  6. Step 6: Final answer
    x = 543,117.59

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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.