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Finding the Fourth Proportional to 715,814.46, 987,810.84 and 393,521.64

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Solution

The fourth proportional to 715,814.46, 987,810.84 and 393,521.64 is: 543,052.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,814.46 : 987,810.84 = 393,521.64 : x
  2. Step 2: Convert to fraction form
    715,814.46/987,810.84 = 393,521.64/x
  3. Step 3: Cross multiply
    715,814.46x = 987,810.84 × 393,521.64
  4. Step 4: Simplify right side
    715,814.46x = 388,724,941,766.58
  5. Step 5: Solve for x
    x = 388,724,941,766.58/715,814.46
  6. Step 6: Final answer
    x = 543,052.65

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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.