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Finding the Fourth Proportional to 617,312.80, 925,969.20 and 550,390.60

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Solution

The fourth proportional to 617,312.80, 925,969.20 and 550,390.60 is: 825,585.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,312.80 : 925,969.20 = 550,390.60 : x
  2. Step 2: Convert to fraction form
    617,312.80/925,969.20 = 550,390.60/x
  3. Step 3: Cross multiply
    617,312.80x = 925,969.20 × 550,390.60
  4. Step 4: Simplify right side
    617,312.80x = 509,644,743,569.52
  5. Step 5: Solve for x
    x = 509,644,743,569.52/617,312.80
  6. Step 6: Final answer
    x = 825,585.90

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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.