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Finding the Fourth Proportional to 543,609.80, 815,414.70 and 455,692.40

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Solution

The fourth proportional to 543,609.80, 815,414.70 and 455,692.40 is: 683,538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,609.80 : 815,414.70 = 455,692.40 : x
  2. Step 2: Convert to fraction form
    543,609.80/815,414.70 = 455,692.40/x
  3. Step 3: Cross multiply
    543,609.80x = 815,414.70 × 455,692.40
  4. Step 4: Simplify right side
    543,609.80x = 371,578,281,638.28
  5. Step 5: Solve for x
    x = 371,578,281,638.28/543,609.80
  6. Step 6: Final answer
    x = 683,538.60

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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.