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Finding the Fourth Proportional to 323,430.90, 485,146.35 and 276,774.90

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Solution

The fourth proportional to 323,430.90, 485,146.35 and 276,774.90 is: 415,162.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,430.90 : 485,146.35 = 276,774.90 : x
  2. Step 2: Convert to fraction form
    323,430.90/485,146.35 = 276,774.90/x
  3. Step 3: Cross multiply
    323,430.90x = 485,146.35 × 276,774.90
  4. Step 4: Simplify right side
    323,430.90x = 134,276,332,506.62
  5. Step 5: Solve for x
    x = 134,276,332,506.62/323,430.90
  6. Step 6: Final answer
    x = 415,162.35

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1.5x scale

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.