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Finding the Fourth Proportional to 520,338.64, 718,081.32 and 293,979.28

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Solution

The fourth proportional to 520,338.64, 718,081.32 and 293,979.28 is: 405,699.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,338.64 : 718,081.32 = 293,979.28 : x
  2. Step 2: Convert to fraction form
    520,338.64/718,081.32 = 293,979.28/x
  3. Step 3: Cross multiply
    520,338.64x = 718,081.32 × 293,979.28
  4. Step 4: Simplify right side
    520,338.64x = 211,101,029,435.05
  5. Step 5: Solve for x
    x = 211,101,029,435.05/520,338.64
  6. Step 6: Final answer
    x = 405,699.31

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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.