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Finding the Fourth Proportional to 418,533.40, 627,800.10 and 402,203.80

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Solution

The fourth proportional to 418,533.40, 627,800.10 and 402,203.80 is: 603,305.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,533.40 : 627,800.10 = 402,203.80 : x
  2. Step 2: Convert to fraction form
    418,533.40/627,800.10 = 402,203.80/x
  3. Step 3: Cross multiply
    418,533.40x = 627,800.10 × 402,203.80
  4. Step 4: Simplify right side
    418,533.40x = 252,503,585,860.38
  5. Step 5: Solve for x
    x = 252,503,585,860.38/418,533.40
  6. Step 6: Final answer
    x = 603,305.70

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1.5x scale

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.