Home / 428,631.56-642,947.34-144,298.33

Finding the Fourth Proportional to 428,631.56, 642,947.34 and 144,298.33

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Solution

The fourth proportional to 428,631.56, 642,947.34 and 144,298.33 is: 216,447.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,631.56 : 642,947.34 = 144,298.33 : x
  2. Step 2: Convert to fraction form
    428,631.56/642,947.34 = 144,298.33/x
  3. Step 3: Cross multiply
    428,631.56x = 642,947.34 × 144,298.33
  4. Step 4: Simplify right side
    428,631.56x = 92,776,224,225.21
  5. Step 5: Solve for x
    x = 92,776,224,225.21/428,631.56
  6. Step 6: Final answer
    x = 216,447.49

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Similar ratio
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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.