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Finding the Fourth Proportional to 520,355.64, 718,104.78 and 293,996.28

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Solution

The fourth proportional to 520,355.64, 718,104.78 and 293,996.28 is: 405,722.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,355.64 : 718,104.78 = 293,996.28 : x
  2. Step 2: Convert to fraction form
    520,355.64/718,104.78 = 293,996.28/x
  3. Step 3: Cross multiply
    520,355.64x = 718,104.78 × 293,996.28
  4. Step 4: Simplify right side
    520,355.64x = 211,120,133,970.22
  5. Step 5: Solve for x
    x = 211,120,133,970.22/520,355.64
  6. Step 6: Final answer
    x = 405,722.77

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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.