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Finding the Fourth Proportional to 465,810.55, 643,306.53 and 320,992.89

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Solution

The fourth proportional to 465,810.55, 643,306.53 and 320,992.89 is: 443,306.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,810.55 : 643,306.53 = 320,992.89 : x
  2. Step 2: Convert to fraction form
    465,810.55/643,306.53 = 320,992.89/x
  3. Step 3: Cross multiply
    465,810.55x = 643,306.53 × 320,992.89
  4. Step 4: Simplify right side
    465,810.55x = 206,496,822,220.57
  5. Step 5: Solve for x
    x = 206,496,822,220.57/465,810.55
  6. Step 6: Final answer
    x = 443,306.45

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1.5x scale

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.