Home / 428,851.38-643,030.96-162,441.98

Finding the Fourth Proportional to 428,851.38, 643,030.96 and 162,441.98

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Solution

The fourth proportional to 428,851.38, 643,030.96 and 162,441.98 is: 243,569.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,851.38 : 643,030.96 = 162,441.98 : x
  2. Step 2: Convert to fraction form
    428,851.38/643,030.96 = 162,441.98/x
  3. Step 3: Cross multiply
    428,851.38x = 643,030.96 × 162,441.98
  4. Step 4: Simplify right side
    428,851.38x = 104,455,222,343.70
  5. Step 5: Solve for x
    x = 104,455,222,343.70/428,851.38
  6. Step 6: Final answer
    x = 243,569.75

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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.