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Finding the Fourth Proportional to 521,255.64, 718,961.89 and 478,373.64

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Solution

The fourth proportional to 521,255.64, 718,961.89 and 478,373.64 is: 659,815.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,255.64 : 718,961.89 = 478,373.64 : x
  2. Step 2: Convert to fraction form
    521,255.64/718,961.89 = 478,373.64/x
  3. Step 3: Cross multiply
    521,255.64x = 718,961.89 × 478,373.64
  4. Step 4: Simplify right side
    521,255.64x = 343,932,416,340.58
  5. Step 5: Solve for x
    x = 343,932,416,340.58/521,255.64
  6. Step 6: Final answer
    x = 659,815.24

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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.