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Finding the Fourth Proportional to 642,503.80, 963,755.70 and 376,564.60

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Solution

The fourth proportional to 642,503.80, 963,755.70 and 376,564.60 is: 564,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,503.80 : 963,755.70 = 376,564.60 : x
  2. Step 2: Convert to fraction form
    642,503.80/963,755.70 = 376,564.60/x
  3. Step 3: Cross multiply
    642,503.80x = 963,755.70 × 376,564.60
  4. Step 4: Simplify right side
    642,503.80x = 362,916,279,668.22
  5. Step 5: Solve for x
    x = 362,916,279,668.22/642,503.80
  6. Step 6: Final answer
    x = 564,846.90

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Similar ratio
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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.