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Finding the Fourth Proportional to 521,316, 720,006.57 and 351,254.88

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Solution

The fourth proportional to 521,316, 720,006.57 and 351,254.88 is: 485,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,316 : 720,006.57 = 351,254.88 : x
  2. Step 2: Convert to fraction form
    521,316/720,006.57 = 351,254.88/x
  3. Step 3: Cross multiply
    521,316x = 720,006.57 × 351,254.88
  4. Step 4: Simplify right side
    521,316x = 252,905,821,344.56
  5. Step 5: Solve for x
    x = 252,905,821,344.56/521,316
  6. Step 6: Final answer
    x = 485,129.60

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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.