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Finding the Fourth Proportional to 547,779.40, 821,669.10 and 379,817.80

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Solution

The fourth proportional to 547,779.40, 821,669.10 and 379,817.80 is: 569,726.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,779.40 : 821,669.10 = 379,817.80 : x
  2. Step 2: Convert to fraction form
    547,779.40/821,669.10 = 379,817.80/x
  3. Step 3: Cross multiply
    547,779.40x = 821,669.10 × 379,817.80
  4. Step 4: Simplify right side
    547,779.40x = 312,084,549,889.98
  5. Step 5: Solve for x
    x = 312,084,549,889.98/547,779.40
  6. Step 6: Final answer
    x = 569,726.70

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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.