Home / 327,813.40-491,720.10-128,140.30

Finding the Fourth Proportional to 327,813.40, 491,720.10 and 128,140.30

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Solution

The fourth proportional to 327,813.40, 491,720.10 and 128,140.30 is: 192,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,813.40 : 491,720.10 = 128,140.30 : x
  2. Step 2: Convert to fraction form
    327,813.40/491,720.10 = 128,140.30/x
  3. Step 3: Cross multiply
    327,813.40x = 491,720.10 × 128,140.30
  4. Step 4: Simplify right side
    327,813.40x = 63,009,161,130.03
  5. Step 5: Solve for x
    x = 63,009,161,130.03/327,813.40
  6. Step 6: Final answer
    x = 192,210.45

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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.