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Finding the Fourth Proportional to 346,809.20, 520,213.80 and 253,497.20

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Solution

The fourth proportional to 346,809.20, 520,213.80 and 253,497.20 is: 380,245.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,809.20 : 520,213.80 = 253,497.20 : x
  2. Step 2: Convert to fraction form
    346,809.20/520,213.80 = 253,497.20/x
  3. Step 3: Cross multiply
    346,809.20x = 520,213.80 × 253,497.20
  4. Step 4: Simplify right side
    346,809.20x = 131,872,741,701.36
  5. Step 5: Solve for x
    x = 131,872,741,701.36/346,809.20
  6. Step 6: Final answer
    x = 380,245.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.