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Finding the Fourth Proportional to 416,279.80, 624,419.70 and 303,430.60

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Solution

The fourth proportional to 416,279.80, 624,419.70 and 303,430.60 is: 455,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    416,279.80 : 624,419.70 = 303,430.60 : x
  2. Step 2: Convert to fraction form
    416,279.80/624,419.70 = 303,430.60/x
  3. Step 3: Cross multiply
    416,279.80x = 624,419.70 × 303,430.60
  4. Step 4: Simplify right side
    416,279.80x = 189,468,044,222.82
  5. Step 5: Solve for x
    x = 189,468,044,222.82/416,279.80
  6. Step 6: Final answer
    x = 455,145.90

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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.