Home / 428,534.48-642,806.76-162,223.40

Finding the Fourth Proportional to 428,534.48, 642,806.76 and 162,223.40

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Solution

The fourth proportional to 428,534.48, 642,806.76 and 162,223.40 is: 243,337.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,534.48 : 642,806.76 = 162,223.40 : x
  2. Step 2: Convert to fraction form
    428,534.48/642,806.76 = 162,223.40/x
  3. Step 3: Cross multiply
    428,534.48x = 642,806.76 × 162,223.40
  4. Step 4: Simplify right side
    428,534.48x = 104,278,298,150.18
  5. Step 5: Solve for x
    x = 104,278,298,150.18/428,534.48
  6. Step 6: Final answer
    x = 243,337.01

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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.