Home / 428,767.04-643,156-162,456.02

Finding the Fourth Proportional to 428,767.04, 643,156 and 162,456.02

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Solution

The fourth proportional to 428,767.04, 643,156 and 162,456.02 is: 243,686.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,767.04 : 643,156 = 162,456.02 : x
  2. Step 2: Convert to fraction form
    428,767.04/643,156 = 162,456.02/x
  3. Step 3: Cross multiply
    428,767.04x = 643,156 × 162,456.02
  4. Step 4: Simplify right side
    428,767.04x = 104,484,563,999.12
  5. Step 5: Solve for x
    x = 104,484,563,999.12/428,767.04
  6. Step 6: Final answer
    x = 243,686.09

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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.