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Finding the Fourth Proportional to 715,034.63, 986,754.92 and 388,354.02

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Solution

The fourth proportional to 715,034.63, 986,754.92 and 388,354.02 is: 535,932.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,034.63 : 986,754.92 = 388,354.02 : x
  2. Step 2: Convert to fraction form
    715,034.63/986,754.92 = 388,354.02/x
  3. Step 3: Cross multiply
    715,034.63x = 986,754.92 × 388,354.02
  4. Step 4: Simplify right side
    715,034.63x = 383,210,237,995.01
  5. Step 5: Solve for x
    x = 383,210,237,995.01/715,034.63
  6. Step 6: Final answer
    x = 535,932.42

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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.