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Finding the Fourth Proportional to 619,116.48, 854,018.74 and 389,309.96

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Solution

The fourth proportional to 619,116.48, 854,018.74 and 389,309.96 is: 537,020.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,116.48 : 854,018.74 = 389,309.96 : x
  2. Step 2: Convert to fraction form
    619,116.48/854,018.74 = 389,309.96/x
  3. Step 3: Cross multiply
    619,116.48x = 854,018.74 × 389,309.96
  4. Step 4: Simplify right side
    619,116.48x = 332,478,004,130.34
  5. Step 5: Solve for x
    x = 332,478,004,130.34/619,116.48
  6. Step 6: Final answer
    x = 537,020.12

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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.