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Finding the Fourth Proportional to 521,369.79, 719,119.28 and 478,487.78

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Solution

The fourth proportional to 521,369.79, 719,119.28 and 478,487.78 is: 659,972.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,369.79 : 719,119.28 = 478,487.78 : x
  2. Step 2: Convert to fraction form
    521,369.79/719,119.28 = 478,487.78/x
  3. Step 3: Cross multiply
    521,369.79x = 719,119.28 × 478,487.78
  4. Step 4: Simplify right side
    521,369.79x = 344,089,787,842.40
  5. Step 5: Solve for x
    x = 344,089,787,842.40/521,369.79
  6. Step 6: Final answer
    x = 659,972.62

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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.