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Finding the Fourth Proportional to 543,395.80, 815,093.70 and 455,478.40

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Solution

The fourth proportional to 543,395.80, 815,093.70 and 455,478.40 is: 683,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,395.80 : 815,093.70 = 455,478.40 : x
  2. Step 2: Convert to fraction form
    543,395.80/815,093.70 = 455,478.40/x
  3. Step 3: Cross multiply
    543,395.80x = 815,093.70 × 455,478.40
  4. Step 4: Simplify right side
    543,395.80x = 371,257,574,326.08
  5. Step 5: Solve for x
    x = 371,257,574,326.08/543,395.80
  6. Step 6: Final answer
    x = 683,217.60

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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.