Home / 428,545.36-642,938.40-158,669.44

Finding the Fourth Proportional to 428,545.36, 642,938.40 and 158,669.44

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Solution

The fourth proportional to 428,545.36, 642,938.40 and 158,669.44 is: 238,048.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,545.36 : 642,938.40 = 158,669.44 : x
  2. Step 2: Convert to fraction form
    428,545.36/642,938.40 = 158,669.44/x
  3. Step 3: Cross multiply
    428,545.36x = 642,938.40 × 158,669.44
  4. Step 4: Simplify right side
    428,545.36x = 102,014,675,882.50
  5. Step 5: Solve for x
    x = 102,014,675,882.50/428,545.36
  6. Step 6: Final answer
    x = 238,048.72

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1.5x scale

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.