Home / 428,528.07-642,873.33-172,380.24

Finding the Fourth Proportional to 428,528.07, 642,873.33 and 172,380.24

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Solution

The fourth proportional to 428,528.07, 642,873.33 and 172,380.24 is: 258,603.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,528.07 : 642,873.33 = 172,380.24 : x
  2. Step 2: Convert to fraction form
    428,528.07/642,873.33 = 172,380.24/x
  3. Step 3: Cross multiply
    428,528.07x = 642,873.33 × 172,380.24
  4. Step 4: Simplify right side
    428,528.07x = 110,818,658,915.00
  5. Step 5: Solve for x
    x = 110,818,658,915.00/428,528.07
  6. Step 6: Final answer
    x = 258,603.03

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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.