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Finding the Fourth Proportional to 478,215.13, 659,910.54 and 263,313.22

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Solution

The fourth proportional to 478,215.13, 659,910.54 and 263,313.22 is: 363,357.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,215.13 : 659,910.54 = 263,313.22 : x
  2. Step 2: Convert to fraction form
    478,215.13/659,910.54 = 263,313.22/x
  3. Step 3: Cross multiply
    478,215.13x = 659,910.54 × 263,313.22
  4. Step 4: Simplify right side
    478,215.13x = 173,763,169,199.34
  5. Step 5: Solve for x
    x = 173,763,169,199.34/478,215.13
  6. Step 6: Final answer
    x = 363,357.74

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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.