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Finding the Fourth Proportional to 620,072.80, 930,109.20 and 609,575.20

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Solution

The fourth proportional to 620,072.80, 930,109.20 and 609,575.20 is: 914,362.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,072.80 : 930,109.20 = 609,575.20 : x
  2. Step 2: Convert to fraction form
    620,072.80/930,109.20 = 609,575.20/x
  3. Step 3: Cross multiply
    620,072.80x = 930,109.20 × 609,575.20
  4. Step 4: Simplify right side
    620,072.80x = 566,971,501,611.84
  5. Step 5: Solve for x
    x = 566,971,501,611.84/620,072.80
  6. Step 6: Final answer
    x = 914,362.80

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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.