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Finding the Fourth Proportional to 672,871.14, 928,634.19 and 411,379.88

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Solution

The fourth proportional to 672,871.14, 928,634.19 and 411,379.88 is: 567,748.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,871.14 : 928,634.19 = 411,379.88 : x
  2. Step 2: Convert to fraction form
    672,871.14/928,634.19 = 411,379.88/x
  3. Step 3: Cross multiply
    672,871.14x = 928,634.19 × 411,379.88
  4. Step 4: Simplify right side
    672,871.14x = 382,021,421,646.10
  5. Step 5: Solve for x
    x = 382,021,421,646.10/672,871.14
  6. Step 6: Final answer
    x = 567,748.26

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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.