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Finding the Fourth Proportional to 917,308.80, 1,374,796.80 and 816,998.40

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Solution

The fourth proportional to 917,308.80, 1,374,796.80 and 816,998.40 is: 1,224,458.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,308.80 : 1,374,796.80 = 816,998.40 : x
  2. Step 2: Convert to fraction form
    917,308.80/1,374,796.80 = 816,998.40/x
  3. Step 3: Cross multiply
    917,308.80x = 1,374,796.80 × 816,998.40
  4. Step 4: Simplify right side
    917,308.80x = 1,123,206,785,925.12
  5. Step 5: Solve for x
    x = 1,123,206,785,925.12/917,308.80
  6. Step 6: Final answer
    x = 1,224,458.75

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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.