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Finding the Fourth Proportional to 577,322.40, 865,983.60 and 388,365.60

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Solution

The fourth proportional to 577,322.40, 865,983.60 and 388,365.60 is: 582,548.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,322.40 : 865,983.60 = 388,365.60 : x
  2. Step 2: Convert to fraction form
    577,322.40/865,983.60 = 388,365.60/x
  3. Step 3: Cross multiply
    577,322.40x = 865,983.60 × 388,365.60
  4. Step 4: Simplify right side
    577,322.40x = 336,318,240,404.16
  5. Step 5: Solve for x
    x = 336,318,240,404.16/577,322.40
  6. Step 6: Final answer
    x = 582,548.40

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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.