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Finding the Fourth Proportional to 674,561.50, 930,930.90 and 388,125.25

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Solution

The fourth proportional to 674,561.50, 930,930.90 and 388,125.25 is: 535,633.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,561.50 : 930,930.90 = 388,125.25 : x
  2. Step 2: Convert to fraction form
    674,561.50/930,930.90 = 388,125.25/x
  3. Step 3: Cross multiply
    674,561.50x = 930,930.90 × 388,125.25
  4. Step 4: Simplify right side
    674,561.50x = 361,317,788,295.23
  5. Step 5: Solve for x
    x = 361,317,788,295.23/674,561.50
  6. Step 6: Final answer
    x = 535,633.58

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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.