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Finding the Fourth Proportional to 321,605.90, 482,432.07 and 84,945.50

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Solution

The fourth proportional to 321,605.90, 482,432.07 and 84,945.50 is: 127,424.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,605.90 : 482,432.07 = 84,945.50 : x
  2. Step 2: Convert to fraction form
    321,605.90/482,432.07 = 84,945.50/x
  3. Step 3: Cross multiply
    321,605.90x = 482,432.07 × 84,945.50
  4. Step 4: Simplify right side
    321,605.90x = 40,980,433,402.19
  5. Step 5: Solve for x
    x = 40,980,433,402.19/321,605.90
  6. Step 6: Final answer
    x = 127,424.38

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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.