Home / 427,111.80-639,792.90-216,868.20

Finding the Fourth Proportional to 427,111.80, 639,792.90 and 216,868.20

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Solution

The fourth proportional to 427,111.80, 639,792.90 and 216,868.20 is: 324,858.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,111.80 : 639,792.90 = 216,868.20 : x
  2. Step 2: Convert to fraction form
    427,111.80/639,792.90 = 216,868.20/x
  3. Step 3: Cross multiply
    427,111.80x = 639,792.90 × 216,868.20
  4. Step 4: Simplify right side
    427,111.80x = 138,750,734,595.78
  5. Step 5: Solve for x
    x = 138,750,734,595.78/427,111.80
  6. Step 6: Final answer
    x = 324,858.12

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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.