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Finding the Fourth Proportional to 305,913.40, 458,421.90 and 274,323.40

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Solution

The fourth proportional to 305,913.40, 458,421.90 and 274,323.40 is: 411,083.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,913.40 : 458,421.90 = 274,323.40 : x
  2. Step 2: Convert to fraction form
    305,913.40/458,421.90 = 274,323.40/x
  3. Step 3: Cross multiply
    305,913.40x = 458,421.90 × 274,323.40
  4. Step 4: Simplify right side
    305,913.40x = 125,755,854,242.46
  5. Step 5: Solve for x
    x = 125,755,854,242.46/305,913.40
  6. Step 6: Final answer
    x = 411,083.18

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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.