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Finding the Fourth Proportional to 717,042, 1,075,563 and 218,406

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Solution

The fourth proportional to 717,042, 1,075,563 and 218,406 is: 327,609

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,042 : 1,075,563 = 218,406 : x
  2. Step 2: Convert to fraction form
    717,042/1,075,563 = 218,406/x
  3. Step 3: Cross multiply
    717,042x = 1,075,563 × 218,406
  4. Step 4: Simplify right side
    717,042x = 234,909,412,578
  5. Step 5: Solve for x
    x = 234,909,412,578/717,042
  6. Step 6: Final answer
    x = 327,609

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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.