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Finding the Fourth Proportional to 385,216.60, 577,824.90 and 259,245.40

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Solution

The fourth proportional to 385,216.60, 577,824.90 and 259,245.40 is: 388,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,216.60 : 577,824.90 = 259,245.40 : x
  2. Step 2: Convert to fraction form
    385,216.60/577,824.90 = 259,245.40/x
  3. Step 3: Cross multiply
    385,216.60x = 577,824.90 × 259,245.40
  4. Step 4: Simplify right side
    385,216.60x = 149,798,447,330.46
  5. Step 5: Solve for x
    x = 149,798,447,330.46/385,216.60
  6. Step 6: Final answer
    x = 388,868.10

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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.