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Finding the Fourth Proportional to 917,216.80, 1,374,658.80 and 816,906.40

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Solution

The fourth proportional to 917,216.80, 1,374,658.80 and 816,906.40 is: 1,224,320.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,216.80 : 1,374,658.80 = 816,906.40 : x
  2. Step 2: Convert to fraction form
    917,216.80/1,374,658.80 = 816,906.40/x
  3. Step 3: Cross multiply
    917,216.80x = 1,374,658.80 × 816,906.40
  4. Step 4: Simplify right side
    917,216.80x = 1,122,967,571,536.32
  5. Step 5: Solve for x
    x = 1,122,967,571,536.32/917,216.80
  6. Step 6: Final answer
    x = 1,224,320.76

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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.