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Finding the Fourth Proportional to 418,409.28, 627,512.40 and 293,170.32

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Solution

The fourth proportional to 418,409.28, 627,512.40 and 293,170.32 is: 439,684.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,409.28 : 627,512.40 = 293,170.32 : x
  2. Step 2: Convert to fraction form
    418,409.28/627,512.40 = 293,170.32/x
  3. Step 3: Cross multiply
    418,409.28x = 627,512.40 × 293,170.32
  4. Step 4: Simplify right side
    418,409.28x = 183,968,011,111.97
  5. Step 5: Solve for x
    x = 183,968,011,111.97/418,409.28
  6. Step 6: Final answer
    x = 439,684.35

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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.