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Finding the Fourth Proportional to 385,331.60, 577,997.40 and 259,360.40

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Solution

The fourth proportional to 385,331.60, 577,997.40 and 259,360.40 is: 389,040.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,331.60 : 577,997.40 = 259,360.40 : x
  2. Step 2: Convert to fraction form
    385,331.60/577,997.40 = 259,360.40/x
  3. Step 3: Cross multiply
    385,331.60x = 577,997.40 × 259,360.40
  4. Step 4: Simplify right side
    385,331.60x = 149,909,636,862.96
  5. Step 5: Solve for x
    x = 149,909,636,862.96/385,331.60
  6. Step 6: Final answer
    x = 389,040.60

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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.