Home / 715,918.55-987,948.65-389,221.25

Finding the Fourth Proportional to 715,918.55, 987,948.65 and 389,221.25

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Solution

The fourth proportional to 715,918.55, 987,948.65 and 389,221.25 is: 537,115.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,918.55 : 987,948.65 = 389,221.25 : x
  2. Step 2: Convert to fraction form
    715,918.55/987,948.65 = 389,221.25/x
  3. Step 3: Cross multiply
    715,918.55x = 987,948.65 × 389,221.25
  4. Step 4: Simplify right side
    715,918.55x = 384,530,606,542.71
  5. Step 5: Solve for x
    x = 384,530,606,542.71/715,918.55
  6. Step 6: Final answer
    x = 537,115.02

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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.