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Finding the Fourth Proportional to 543,487.40, 815,231.10 and 149,503.40

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Solution

The fourth proportional to 543,487.40, 815,231.10 and 149,503.40 is: 224,255.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,487.40 : 815,231.10 = 149,503.40 : x
  2. Step 2: Convert to fraction form
    543,487.40/815,231.10 = 149,503.40/x
  3. Step 3: Cross multiply
    543,487.40x = 815,231.10 × 149,503.40
  4. Step 4: Simplify right side
    543,487.40x = 121,879,821,235.74
  5. Step 5: Solve for x
    x = 121,879,821,235.74/543,487.40
  6. Step 6: Final answer
    x = 224,255.10

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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.