Home / 428,500.16-642,756.59-162,189.17

Finding the Fourth Proportional to 428,500.16, 642,756.59 and 162,189.17

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Solution

The fourth proportional to 428,500.16, 642,756.59 and 162,189.17 is: 243,286.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,500.16 : 642,756.59 = 162,189.17 : x
  2. Step 2: Convert to fraction form
    428,500.16/642,756.59 = 162,189.17/x
  3. Step 3: Cross multiply
    428,500.16x = 642,756.59 × 162,189.17
  4. Step 4: Simplify right side
    428,500.16x = 104,248,159,248.29
  5. Step 5: Solve for x
    x = 104,248,159,248.29/428,500.16
  6. Step 6: Final answer
    x = 243,286.16

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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.