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Finding the Fourth Proportional to 547,661.20, 821,491.80 and 153,677.20

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Solution

The fourth proportional to 547,661.20, 821,491.80 and 153,677.20 is: 230,515.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,661.20 : 821,491.80 = 153,677.20 : x
  2. Step 2: Convert to fraction form
    547,661.20/821,491.80 = 153,677.20/x
  3. Step 3: Cross multiply
    547,661.20x = 821,491.80 × 153,677.20
  4. Step 4: Simplify right side
    547,661.20x = 126,244,559,646.96
  5. Step 5: Solve for x
    x = 126,244,559,646.96/547,661.20
  6. Step 6: Final answer
    x = 230,515.80

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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.