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Finding the Fourth Proportional to 421,404.80, 632,452.80 and 407,580.80

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Solution

The fourth proportional to 421,404.80, 632,452.80 and 407,580.80 is: 611,705.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,404.80 : 632,452.80 = 407,580.80 : x
  2. Step 2: Convert to fraction form
    421,404.80/632,452.80 = 407,580.80/x
  3. Step 3: Cross multiply
    421,404.80x = 632,452.80 × 407,580.80
  4. Step 4: Simplify right side
    421,404.80x = 257,775,618,186.24
  5. Step 5: Solve for x
    x = 257,775,618,186.24/421,404.80
  6. Step 6: Final answer
    x = 611,705.46

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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.