Home / 715,909.31-987,973.55-389,244.29

Finding the Fourth Proportional to 715,909.31, 987,973.55 and 389,244.29

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Solution

The fourth proportional to 715,909.31, 987,973.55 and 389,244.29 is: 537,167.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,909.31 : 987,973.55 = 389,244.29 : x
  2. Step 2: Convert to fraction form
    715,909.31/987,973.55 = 389,244.29/x
  3. Step 3: Cross multiply
    715,909.31x = 987,973.55 × 389,244.29
  4. Step 4: Simplify right side
    715,909.31x = 384,563,063,981.64
  5. Step 5: Solve for x
    x = 384,563,063,981.64/715,909.31
  6. Step 6: Final answer
    x = 537,167.29

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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.