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Finding the Fourth Proportional to 371,422.38, 510,589.51 and 319,548.80

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Solution

The fourth proportional to 371,422.38, 510,589.51 and 319,548.80 is: 439,279.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,422.38 : 510,589.51 = 319,548.80 : x
  2. Step 2: Convert to fraction form
    371,422.38/510,589.51 = 319,548.80/x
  3. Step 3: Cross multiply
    371,422.38x = 510,589.51 × 319,548.80
  4. Step 4: Simplify right side
    371,422.38x = 163,158,265,213.09
  5. Step 5: Solve for x
    x = 163,158,265,213.09/371,422.38
  6. Step 6: Final answer
    x = 439,279.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.