Home / 715,931.66-987,959.12-393,622.58

Finding the Fourth Proportional to 715,931.66, 987,959.12 and 393,622.58

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Solution

The fourth proportional to 715,931.66, 987,959.12 and 393,622.58 is: 543,184.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,931.66 : 987,959.12 = 393,622.58 : x
  2. Step 2: Convert to fraction form
    715,931.66/987,959.12 = 393,622.58/x
  3. Step 3: Cross multiply
    715,931.66x = 987,959.12 × 393,622.58
  4. Step 4: Simplify right side
    715,931.66x = 388,883,017,748.93
  5. Step 5: Solve for x
    x = 388,883,017,748.93/715,931.66
  6. Step 6: Final answer
    x = 543,184.55

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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.