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Finding the Fourth Proportional to 543,379.20, 815,068.80 and 188,429.10

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Solution

The fourth proportional to 543,379.20, 815,068.80 and 188,429.10 is: 282,643.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,379.20 : 815,068.80 = 188,429.10 : x
  2. Step 2: Convert to fraction form
    543,379.20/815,068.80 = 188,429.10/x
  3. Step 3: Cross multiply
    543,379.20x = 815,068.80 × 188,429.10
  4. Step 4: Simplify right side
    543,379.20x = 153,582,680,422.08
  5. Step 5: Solve for x
    x = 153,582,680,422.08/543,379.20
  6. Step 6: Final answer
    x = 282,643.65

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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.