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Finding the Fourth Proportional to 1,276,673.92, 1,914,941.76 and 390,209.92

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Solution

The fourth proportional to 1,276,673.92, 1,914,941.76 and 390,209.92 is: 585,293.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276,673.92 : 1,914,941.76 = 390,209.92 : x
  2. Step 2: Convert to fraction form
    1,276,673.92/1,914,941.76 = 390,209.92/x
  3. Step 3: Cross multiply
    1,276,673.92x = 1,914,941.76 × 390,209.92
  4. Step 4: Simplify right side
    1,276,673.92x = 747,229,270,974.26
  5. Step 5: Solve for x
    x = 747,229,270,974.26/1,276,673.92
  6. Step 6: Final answer
    x = 585,293.75

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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.