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Finding the Fourth Proportional to 418,538.40, 627,807.60 and 418,538.40

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Solution

The fourth proportional to 418,538.40, 627,807.60 and 418,538.40 is: 627,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,538.40 : 627,807.60 = 418,538.40 : x
  2. Step 2: Convert to fraction form
    418,538.40/627,807.60 = 418,538.40/x
  3. Step 3: Cross multiply
    418,538.40x = 627,807.60 × 418,538.40
  4. Step 4: Simplify right side
    418,538.40x = 262,761,588,411.84
  5. Step 5: Solve for x
    x = 262,761,588,411.84/418,538.40
  6. Step 6: Final answer
    x = 627,807.60

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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.