Home / 715,937.16-987,966.72-393,628.08

Finding the Fourth Proportional to 715,937.16, 987,966.72 and 393,628.08

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Solution

The fourth proportional to 715,937.16, 987,966.72 and 393,628.08 is: 543,192.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,937.16 : 987,966.72 = 393,628.08 : x
  2. Step 2: Convert to fraction form
    715,937.16/987,966.72 = 393,628.08/x
  3. Step 3: Cross multiply
    715,937.16x = 987,966.72 × 393,628.08
  4. Step 4: Simplify right side
    715,937.16x = 388,891,443,097.50
  5. Step 5: Solve for x
    x = 388,891,443,097.50/715,937.16
  6. Step 6: Final answer
    x = 543,192.15

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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.