Home / 521,258.20-718,965.42-478,376.20

Finding the Fourth Proportional to 521,258.20, 718,965.42 and 478,376.20

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Solution

The fourth proportional to 521,258.20, 718,965.42 and 478,376.20 is: 659,818.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,258.20 : 718,965.42 = 478,376.20 : x
  2. Step 2: Convert to fraction form
    521,258.20/718,965.42 = 478,376.20/x
  3. Step 3: Cross multiply
    521,258.20x = 718,965.42 × 478,376.20
  4. Step 4: Simplify right side
    521,258.20x = 343,935,945,551.00
  5. Step 5: Solve for x
    x = 343,935,945,551.00/521,258.20
  6. Step 6: Final answer
    x = 659,818.77

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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.