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Finding the Fourth Proportional to 611,405.42, 916,253.84 and 520,975.94

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Solution

The fourth proportional to 611,405.42, 916,253.84 and 520,975.94 is: 780,735.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,405.42 : 916,253.84 = 520,975.94 : x
  2. Step 2: Convert to fraction form
    611,405.42/916,253.84 = 520,975.94/x
  3. Step 3: Cross multiply
    611,405.42x = 916,253.84 × 520,975.94
  4. Step 4: Simplify right side
    611,405.42x = 477,346,205,572.61
  5. Step 5: Solve for x
    x = 477,346,205,572.61/611,405.42
  6. Step 6: Final answer
    x = 780,735.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.