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Finding the Fourth Proportional to 628,714.26, 867,157.77 and 399,072.06

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Solution

The fourth proportional to 628,714.26, 867,157.77 and 399,072.06 is: 550,422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,714.26 : 867,157.77 = 399,072.06 : x
  2. Step 2: Convert to fraction form
    628,714.26/867,157.77 = 399,072.06/x
  3. Step 3: Cross multiply
    628,714.26x = 867,157.77 × 399,072.06
  4. Step 4: Simplify right side
    628,714.26x = 346,058,437,618.91
  5. Step 5: Solve for x
    x = 346,058,437,618.91/628,714.26
  6. Step 6: Final answer
    x = 550,422.44

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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.