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Finding the Fourth Proportional to 1,577,986.40, 2,365,813.20 and 868,815.20

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Solution

The fourth proportional to 1,577,986.40, 2,365,813.20 and 868,815.20 is: 1,302,580.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577,986.40 : 2,365,813.20 = 868,815.20 : x
  2. Step 2: Convert to fraction form
    1,577,986.40/2,365,813.20 = 868,815.20/x
  3. Step 3: Cross multiply
    1,577,986.40x = 2,365,813.20 × 868,815.20
  4. Step 4: Simplify right side
    1,577,986.40x = 2,055,454,468,520.64
  5. Step 5: Solve for x
    x = 2,055,454,468,520.64/1,577,986.40
  6. Step 6: Final answer
    x = 1,302,580.60

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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.