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Finding the Fourth Proportional to 545,412.40, 818,118.60 and 171,435.40

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Solution

The fourth proportional to 545,412.40, 818,118.60 and 171,435.40 is: 257,153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,412.40 : 818,118.60 = 171,435.40 : x
  2. Step 2: Convert to fraction form
    545,412.40/818,118.60 = 171,435.40/x
  3. Step 3: Cross multiply
    545,412.40x = 818,118.60 × 171,435.40
  4. Step 4: Simplify right side
    545,412.40x = 140,254,489,438.44
  5. Step 5: Solve for x
    x = 140,254,489,438.44/545,412.40
  6. Step 6: Final answer
    x = 257,153.10

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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.