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Finding the Fourth Proportional to 418,717.20, 628,075.80 and 376,726.80

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Solution

The fourth proportional to 418,717.20, 628,075.80 and 376,726.80 is: 565,090.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,717.20 : 628,075.80 = 376,726.80 : x
  2. Step 2: Convert to fraction form
    418,717.20/628,075.80 = 376,726.80/x
  3. Step 3: Cross multiply
    418,717.20x = 628,075.80 × 376,726.80
  4. Step 4: Simplify right side
    418,717.20x = 236,612,986,291.44
  5. Step 5: Solve for x
    x = 236,612,986,291.44/418,717.20
  6. Step 6: Final answer
    x = 565,090.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.