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Finding the Fourth Proportional to 543,415.80, 815,123.70 and 455,498.40

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Solution

The fourth proportional to 543,415.80, 815,123.70 and 455,498.40 is: 683,247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,415.80 : 815,123.70 = 455,498.40 : x
  2. Step 2: Convert to fraction form
    543,415.80/815,123.70 = 455,498.40/x
  3. Step 3: Cross multiply
    543,415.80x = 815,123.70 × 455,498.40
  4. Step 4: Simplify right side
    543,415.80x = 371,287,541,152.08
  5. Step 5: Solve for x
    x = 371,287,541,152.08/543,415.80
  6. Step 6: Final answer
    x = 683,247.60

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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.