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Finding the Fourth Proportional to 461,250.40, 691,810.80 and 145,739.20

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Solution

The fourth proportional to 461,250.40, 691,810.80 and 145,739.20 is: 218,588.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,250.40 : 691,810.80 = 145,739.20 : x
  2. Step 2: Convert to fraction form
    461,250.40/691,810.80 = 145,739.20/x
  3. Step 3: Cross multiply
    461,250.40x = 691,810.80 × 145,739.20
  4. Step 4: Simplify right side
    461,250.40x = 100,823,952,543.36
  5. Step 5: Solve for x
    x = 100,823,952,543.36/461,250.40
  6. Step 6: Final answer
    x = 218,588.33

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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.