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Finding the Fourth Proportional to 521,256.64, 718,963.27 and 478,374.64

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Solution

The fourth proportional to 521,256.64, 718,963.27 and 478,374.64 is: 659,816.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,256.64 : 718,963.27 = 478,374.64 : x
  2. Step 2: Convert to fraction form
    521,256.64/718,963.27 = 478,374.64/x
  3. Step 3: Cross multiply
    521,256.64x = 718,963.27 × 478,374.64
  4. Step 4: Simplify right side
    521,256.64x = 343,933,795,459.47
  5. Step 5: Solve for x
    x = 343,933,795,459.47/521,256.64
  6. Step 6: Final answer
    x = 659,816.62

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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.