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Finding the Fourth Proportional to 518,290.22, 715,264.80 and 303,499.46

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Solution

The fourth proportional to 518,290.22, 715,264.80 and 303,499.46 is: 418,843.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,290.22 : 715,264.80 = 303,499.46 : x
  2. Step 2: Convert to fraction form
    518,290.22/715,264.80 = 303,499.46/x
  3. Step 3: Cross multiply
    518,290.22x = 715,264.80 × 303,499.46
  4. Step 4: Simplify right side
    518,290.22x = 217,082,480,557.01
  5. Step 5: Solve for x
    x = 217,082,480,557.01/518,290.22
  6. Step 6: Final answer
    x = 418,843.48

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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.