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Finding the Fourth Proportional to 418,422.90, 577,571.67 and 248,655

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Solution

The fourth proportional to 418,422.90, 577,571.67 and 248,655 is: 343,231.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,422.90 : 577,571.67 = 248,655 : x
  2. Step 2: Convert to fraction form
    418,422.90/577,571.67 = 248,655/x
  3. Step 3: Cross multiply
    418,422.90x = 577,571.67 × 248,655
  4. Step 4: Simplify right side
    418,422.90x = 143,616,083,603.85
  5. Step 5: Solve for x
    x = 143,616,083,603.85/418,422.90
  6. Step 6: Final answer
    x = 343,231.89

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1.5x scale

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.