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Finding the Fourth Proportional to 545,390.60, 818,085.90 and 405,422.60

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Solution

The fourth proportional to 545,390.60, 818,085.90 and 405,422.60 is: 608,133.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,390.60 : 818,085.90 = 405,422.60 : x
  2. Step 2: Convert to fraction form
    545,390.60/818,085.90 = 405,422.60/x
  3. Step 3: Cross multiply
    545,390.60x = 818,085.90 × 405,422.60
  4. Step 4: Simplify right side
    545,390.60x = 331,670,512,601.34
  5. Step 5: Solve for x
    x = 331,670,512,601.34/545,390.60
  6. Step 6: Final answer
    x = 608,133.90

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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.