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Finding the Fourth Proportional to 547,765.20, 821,647.80 and 153,781.20

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Solution

The fourth proportional to 547,765.20, 821,647.80 and 153,781.20 is: 230,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,765.20 : 821,647.80 = 153,781.20 : x
  2. Step 2: Convert to fraction form
    547,765.20/821,647.80 = 153,781.20/x
  3. Step 3: Cross multiply
    547,765.20x = 821,647.80 × 153,781.20
  4. Step 4: Simplify right side
    547,765.20x = 126,353,984,661.36
  5. Step 5: Solve for x
    x = 126,353,984,661.36/547,765.20
  6. Step 6: Final answer
    x = 230,671.80

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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.