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Finding the Fourth Proportional to 1,290,957.48, 1,934,664.66 and 816,794.01

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Solution

The fourth proportional to 1,290,957.48, 1,934,664.66 and 816,794.01 is: 1,224,070.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,957.48 : 1,934,664.66 = 816,794.01 : x
  2. Step 2: Convert to fraction form
    1,290,957.48/1,934,664.66 = 816,794.01/x
  3. Step 3: Cross multiply
    1,290,957.48x = 1,934,664.66 × 816,794.01
  4. Step 4: Simplify right side
    1,290,957.48x = 1,580,222,505,646.69
  5. Step 5: Solve for x
    x = 1,580,222,505,646.69/1,290,957.48
  6. Step 6: Final answer
    x = 1,224,070.14

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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.