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Finding the Fourth Proportional to 1,294,390.86, 1,786,182.53 and 742,979.17

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Solution

The fourth proportional to 1,294,390.86, 1,786,182.53 and 742,979.17 is: 1,025,267.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,390.86 : 1,786,182.53 = 742,979.17 : x
  2. Step 2: Convert to fraction form
    1,294,390.86/1,786,182.53 = 742,979.17/x
  3. Step 3: Cross multiply
    1,294,390.86x = 1,786,182.53 × 742,979.17
  4. Step 4: Simplify right side
    1,294,390.86x = 1,327,096,413,607.90
  5. Step 5: Solve for x
    x = 1,327,096,413,607.90/1,294,390.86
  6. Step 6: Final answer
    x = 1,025,267.14

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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.