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Finding the Fourth Proportional to 547,783.80, 821,675.70 and 311,587.80

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Solution

The fourth proportional to 547,783.80, 821,675.70 and 311,587.80 is: 467,381.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,783.80 : 821,675.70 = 311,587.80 : x
  2. Step 2: Convert to fraction form
    547,783.80/821,675.70 = 311,587.80/x
  3. Step 3: Cross multiply
    547,783.80x = 821,675.70 × 311,587.80
  4. Step 4: Simplify right side
    547,783.80x = 256,024,123,676.46
  5. Step 5: Solve for x
    x = 256,024,123,676.46/547,783.80
  6. Step 6: Final answer
    x = 467,381.70

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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.