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Finding the Fourth Proportional to 418,543.40, 627,815.10 and 418,543.40

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Solution

The fourth proportional to 418,543.40, 627,815.10 and 418,543.40 is: 627,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,543.40 : 627,815.10 = 418,543.40 : x
  2. Step 2: Convert to fraction form
    418,543.40/627,815.10 = 418,543.40/x
  3. Step 3: Cross multiply
    418,543.40x = 627,815.10 × 418,543.40
  4. Step 4: Simplify right side
    418,543.40x = 262,767,866,525.34
  5. Step 5: Solve for x
    x = 262,767,866,525.34/418,543.40
  6. Step 6: Final answer
    x = 627,815.10

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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.