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Finding the Fourth Proportional to 427,150.80, 639,851.40 and 216,907.20

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Solution

The fourth proportional to 427,150.80, 639,851.40 and 216,907.20 is: 324,916.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,150.80 : 639,851.40 = 216,907.20 : x
  2. Step 2: Convert to fraction form
    427,150.80/639,851.40 = 216,907.20/x
  3. Step 3: Cross multiply
    427,150.80x = 639,851.40 × 216,907.20
  4. Step 4: Simplify right side
    427,150.80x = 138,788,375,590.08
  5. Step 5: Solve for x
    x = 138,788,375,590.08/427,150.80
  6. Step 6: Final answer
    x = 324,916.58

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1.5x scale

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.