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Finding the Fourth Proportional to 525,090.80, 786,469.80 and 455,106.80

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Solution

The fourth proportional to 525,090.80, 786,469.80 and 455,106.80 is: 681,649.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,090.80 : 786,469.80 = 455,106.80 : x
  2. Step 2: Convert to fraction form
    525,090.80/786,469.80 = 455,106.80/x
  3. Step 3: Cross multiply
    525,090.80x = 786,469.80 × 455,106.80
  4. Step 4: Simplify right side
    525,090.80x = 357,927,753,974.64
  5. Step 5: Solve for x
    x = 357,927,753,974.64/525,090.80
  6. Step 6: Final answer
    x = 681,649.26

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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.