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Finding the Fourth Proportional to 619,115.40, 854,017.26 and 389,308.98

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Solution

The fourth proportional to 619,115.40, 854,017.26 and 389,308.98 is: 537,018.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,115.40 : 854,017.26 = 389,308.98 : x
  2. Step 2: Convert to fraction form
    619,115.40/854,017.26 = 389,308.98/x
  3. Step 3: Cross multiply
    619,115.40x = 854,017.26 × 389,308.98
  4. Step 4: Simplify right side
    619,115.40x = 332,476,588,393.00
  5. Step 5: Solve for x
    x = 332,476,588,393.00/619,115.40
  6. Step 6: Final answer
    x = 537,018.77

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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.