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Finding the Fourth Proportional to 620,580.20, 930,870.30 and 408,003.80

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Solution

The fourth proportional to 620,580.20, 930,870.30 and 408,003.80 is: 612,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,580.20 : 930,870.30 = 408,003.80 : x
  2. Step 2: Convert to fraction form
    620,580.20/930,870.30 = 408,003.80/x
  3. Step 3: Cross multiply
    620,580.20x = 930,870.30 × 408,003.80
  4. Step 4: Simplify right side
    620,580.20x = 379,798,619,707.14
  5. Step 5: Solve for x
    x = 379,798,619,707.14/620,580.20
  6. Step 6: Final answer
    x = 612,005.70

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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.