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Finding the Fourth Proportional to 543,674.10, 815,511.15 and 517,430.10

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Solution

The fourth proportional to 543,674.10, 815,511.15 and 517,430.10 is: 776,145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,674.10 : 815,511.15 = 517,430.10 : x
  2. Step 2: Convert to fraction form
    543,674.10/815,511.15 = 517,430.10/x
  3. Step 3: Cross multiply
    543,674.10x = 815,511.15 × 517,430.10
  4. Step 4: Simplify right side
    543,674.10x = 421,970,015,895.62
  5. Step 5: Solve for x
    x = 421,970,015,895.62/543,674.10
  6. Step 6: Final answer
    x = 776,145.15

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Double scale
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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.