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Finding the Fourth Proportional to 215,426.80, 323,485.80 and 145,615.60

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Solution

The fourth proportional to 215,426.80, 323,485.80 and 145,615.60 is: 218,657.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,426.80 : 323,485.80 = 145,615.60 : x
  2. Step 2: Convert to fraction form
    215,426.80/323,485.80 = 145,615.60/x
  3. Step 3: Cross multiply
    215,426.80x = 323,485.80 × 145,615.60
  4. Step 4: Simplify right side
    215,426.80x = 47,104,578,858.48
  5. Step 5: Solve for x
    x = 47,104,578,858.48/215,426.80
  6. Step 6: Final answer
    x = 218,657.00

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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.