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Finding the Fourth Proportional to 612,129.40, 918,194.10 and 545,644.60

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Solution

The fourth proportional to 612,129.40, 918,194.10 and 545,644.60 is: 818,466.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,129.40 : 918,194.10 = 545,644.60 : x
  2. Step 2: Convert to fraction form
    612,129.40/918,194.10 = 545,644.60/x
  3. Step 3: Cross multiply
    612,129.40x = 918,194.10 × 545,644.60
  4. Step 4: Simplify right side
    612,129.40x = 501,007,652,416.86
  5. Step 5: Solve for x
    x = 501,007,652,416.86/612,129.40
  6. Step 6: Final answer
    x = 818,466.90

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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.