Home / 428,916.60-643,374.90-162,588.60

Finding the Fourth Proportional to 428,916.60, 643,374.90 and 162,588.60

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Solution

The fourth proportional to 428,916.60, 643,374.90 and 162,588.60 is: 243,882.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,916.60 : 643,374.90 = 162,588.60 : x
  2. Step 2: Convert to fraction form
    428,916.60/643,374.90 = 162,588.60/x
  3. Step 3: Cross multiply
    428,916.60x = 643,374.90 × 162,588.60
  4. Step 4: Simplify right side
    428,916.60x = 104,605,424,266.14
  5. Step 5: Solve for x
    x = 104,605,424,266.14/428,916.60
  6. Step 6: Final answer
    x = 243,882.90

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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.