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Finding the Fourth Proportional to 449,649.72, 620,641.70 and 258,724.60

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Solution

The fourth proportional to 449,649.72, 620,641.70 and 258,724.60 is: 357,111.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,649.72 : 620,641.70 = 258,724.60 : x
  2. Step 2: Convert to fraction form
    449,649.72/620,641.70 = 258,724.60/x
  3. Step 3: Cross multiply
    449,649.72x = 620,641.70 × 258,724.60
  4. Step 4: Simplify right side
    449,649.72x = 160,575,275,575.82
  5. Step 5: Solve for x
    x = 160,575,275,575.82/449,649.72
  6. Step 6: Final answer
    x = 357,111.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.