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Finding the Fourth Proportional to 612,121.80, 918,182.70 and 433,662.60

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Solution

The fourth proportional to 612,121.80, 918,182.70 and 433,662.60 is: 650,493.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,121.80 : 918,182.70 = 433,662.60 : x
  2. Step 2: Convert to fraction form
    612,121.80/918,182.70 = 433,662.60/x
  3. Step 3: Cross multiply
    612,121.80x = 918,182.70 × 433,662.60
  4. Step 4: Simplify right side
    612,121.80x = 398,181,496,957.02
  5. Step 5: Solve for x
    x = 398,181,496,957.02/612,121.80
  6. Step 6: Final answer
    x = 650,493.90

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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.