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Finding the Fourth Proportional to 266,080,405.60, 398,921,542.80 and 145,048,520.80

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Solution

The fourth proportional to 266,080,405.60, 398,921,542.80 and 145,048,520.80 is: 217,464,264.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,080,405.60 : 398,921,542.80 = 145,048,520.80 : x
  2. Step 2: Convert to fraction form
    266,080,405.60/398,921,542.80 = 145,048,520.80/x
  3. Step 3: Cross multiply
    266,080,405.60x = 398,921,542.80 × 145,048,520.80
  4. Step 4: Simplify right side
    266,080,405.60x = 57,862,979,698,393,896
  5. Step 5: Solve for x
    x = 57,862,979,698,393,896/266,080,405.60
  6. Step 6: Final answer
    x = 217,464,264.49

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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.