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Finding the Fourth Proportional to 1,354,918.23, 1,869,652.41 and 782,142.93

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Solution

The fourth proportional to 1,354,918.23, 1,869,652.41 and 782,142.93 is: 1,079,279.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,918.23 : 1,869,652.41 = 782,142.93 : x
  2. Step 2: Convert to fraction form
    1,354,918.23/1,869,652.41 = 782,142.93/x
  3. Step 3: Cross multiply
    1,354,918.23x = 1,869,652.41 × 782,142.93
  4. Step 4: Simplify right side
    1,354,918.23x = 1,462,335,414,038.96
  5. Step 5: Solve for x
    x = 1,462,335,414,038.96/1,354,918.23
  6. Step 6: Final answer
    x = 1,079,279.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.