Home / 646,542.45-891,983.21-391,800.69

Finding the Fourth Proportional to 646,542.45, 891,983.21 and 391,800.69

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Solution

The fourth proportional to 646,542.45, 891,983.21 and 391,800.69 is: 540,536.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,542.45 : 891,983.21 = 391,800.69 : x
  2. Step 2: Convert to fraction form
    646,542.45/891,983.21 = 391,800.69/x
  3. Step 3: Cross multiply
    646,542.45x = 891,983.21 × 391,800.69
  4. Step 4: Simplify right side
    646,542.45x = 349,479,635,187.41
  5. Step 5: Solve for x
    x = 349,479,635,187.41/646,542.45
  6. Step 6: Final answer
    x = 540,536.26

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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.