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Finding the Fourth Proportional to 547,543.70, 821,315.55 and 311,614.10

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Solution

The fourth proportional to 547,543.70, 821,315.55 and 311,614.10 is: 467,421.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,543.70 : 821,315.55 = 311,614.10 : x
  2. Step 2: Convert to fraction form
    547,543.70/821,315.55 = 311,614.10/x
  3. Step 3: Cross multiply
    547,543.70x = 821,315.55 × 311,614.10
  4. Step 4: Simplify right side
    547,543.70x = 255,933,505,929.26
  5. Step 5: Solve for x
    x = 255,933,505,929.26/547,543.70
  6. Step 6: Final answer
    x = 467,421.15

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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.