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Finding the Fourth Proportional to 458,427.80, 687,641.70 and 410,216.60

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Solution

The fourth proportional to 458,427.80, 687,641.70 and 410,216.60 is: 615,324.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,427.80 : 687,641.70 = 410,216.60 : x
  2. Step 2: Convert to fraction form
    458,427.80/687,641.70 = 410,216.60/x
  3. Step 3: Cross multiply
    458,427.80x = 687,641.70 × 410,216.60
  4. Step 4: Simplify right side
    458,427.80x = 282,082,040,192.22
  5. Step 5: Solve for x
    x = 282,082,040,192.22/458,427.80
  6. Step 6: Final answer
    x = 615,324.90

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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.