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Finding the Fourth Proportional to 520,378.24, 718,112.64 and 294,018.88

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Solution

The fourth proportional to 520,378.24, 718,112.64 and 294,018.88 is: 405,740.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,378.24 : 718,112.64 = 294,018.88 : x
  2. Step 2: Convert to fraction form
    520,378.24/718,112.64 = 294,018.88/x
  3. Step 3: Cross multiply
    520,378.24x = 718,112.64 × 294,018.88
  4. Step 4: Simplify right side
    520,378.24x = 211,138,674,126.64
  5. Step 5: Solve for x
    x = 211,138,674,126.64/520,378.24
  6. Step 6: Final answer
    x = 405,740.78

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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.