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Finding the Fourth Proportional to 428,767.56, 642,697.56 and 144,187.20

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Solution

The fourth proportional to 428,767.56, 642,697.56 and 144,187.20 is: 216,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,767.56 : 642,697.56 = 144,187.20 : x
  2. Step 2: Convert to fraction form
    428,767.56/642,697.56 = 144,187.20/x
  3. Step 3: Cross multiply
    428,767.56x = 642,697.56 × 144,187.20
  4. Step 4: Simplify right side
    428,767.56x = 92,668,761,623.23
  5. Step 5: Solve for x
    x = 92,668,761,623.23/428,767.56
  6. Step 6: Final answer
    x = 216,128.20

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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.