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Finding the Fourth Proportional to 917,840.20, 1,375,415.70 and 823,070.20

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Solution

The fourth proportional to 917,840.20, 1,375,415.70 and 823,070.20 is: 1,233,399.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,840.20 : 1,375,415.70 = 823,070.20 : x
  2. Step 2: Convert to fraction form
    917,840.20/1,375,415.70 = 823,070.20/x
  3. Step 3: Cross multiply
    917,840.20x = 1,375,415.70 × 823,070.20
  4. Step 4: Simplify right side
    917,840.20x = 1,132,063,675,282.14
  5. Step 5: Solve for x
    x = 1,132,063,675,282.14/917,840.20
  6. Step 6: Final answer
    x = 1,233,399.53

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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.