Home / 310,260.12-428,147.10-189,603.24

Finding the Fourth Proportional to 310,260.12, 428,147.10 and 189,603.24

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Solution

The fourth proportional to 310,260.12, 428,147.10 and 189,603.24 is: 261,645.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,260.12 : 428,147.10 = 189,603.24 : x
  2. Step 2: Convert to fraction form
    310,260.12/428,147.10 = 189,603.24/x
  3. Step 3: Cross multiply
    310,260.12x = 428,147.10 × 189,603.24
  4. Step 4: Simplify right side
    310,260.12x = 81,178,077,356.60
  5. Step 5: Solve for x
    x = 81,178,077,356.60/310,260.12
  6. Step 6: Final answer
    x = 261,645.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.