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Finding the Fourth Proportional to 868,627.20, 1,302,940.80 and 805,641.60

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Solution

The fourth proportional to 868,627.20, 1,302,940.80 and 805,641.60 is: 1,208,462.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,627.20 : 1,302,940.80 = 805,641.60 : x
  2. Step 2: Convert to fraction form
    868,627.20/1,302,940.80 = 805,641.60/x
  3. Step 3: Cross multiply
    868,627.20x = 1,302,940.80 × 805,641.60
  4. Step 4: Simplify right side
    868,627.20x = 1,049,703,310,817.28
  5. Step 5: Solve for x
    x = 1,049,703,310,817.28/868,627.20
  6. Step 6: Final answer
    x = 1,208,462.40

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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.