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Finding the Fourth Proportional to 521,570.90, 719,061.08 and 445,902.78

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Solution

The fourth proportional to 521,570.90, 719,061.08 and 445,902.78 is: 614,741.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,570.90 : 719,061.08 = 445,902.78 : x
  2. Step 2: Convert to fraction form
    521,570.90/719,061.08 = 445,902.78/x
  3. Step 3: Cross multiply
    521,570.90x = 719,061.08 × 445,902.78
  4. Step 4: Simplify right side
    521,570.90x = 320,631,334,561.80
  5. Step 5: Solve for x
    x = 320,631,334,561.80/521,570.90
  6. Step 6: Final answer
    x = 614,741.61

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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.