Home / 715,279.74-987,070.17-388,584.31

Finding the Fourth Proportional to 715,279.74, 987,070.17 and 388,584.31

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Solution

The fourth proportional to 715,279.74, 987,070.17 and 388,584.31 is: 536,237.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,279.74 : 987,070.17 = 388,584.31 : x
  2. Step 2: Convert to fraction form
    715,279.74/987,070.17 = 388,584.31/x
  3. Step 3: Cross multiply
    715,279.74x = 987,070.17 × 388,584.31
  4. Step 4: Simplify right side
    715,279.74x = 383,559,980,931.03
  5. Step 5: Solve for x
    x = 383,559,980,931.03/715,279.74
  6. Step 6: Final answer
    x = 536,237.73

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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.