Home / 642,965.90-887,347.26-356,578.25

Finding the Fourth Proportional to 642,965.90, 887,347.26 and 356,578.25

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Solution

The fourth proportional to 642,965.90, 887,347.26 and 356,578.25 is: 492,108.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,965.90 : 887,347.26 = 356,578.25 : x
  2. Step 2: Convert to fraction form
    642,965.90/887,347.26 = 356,578.25/x
  3. Step 3: Cross multiply
    642,965.90x = 887,347.26 × 356,578.25
  4. Step 4: Simplify right side
    642,965.90x = 316,408,733,113.10
  5. Step 5: Solve for x
    x = 316,408,733,113.10/642,965.90
  6. Step 6: Final answer
    x = 492,108.11

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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.