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Finding the Fourth Proportional to 638,959.08, 958,078.98 and 212,266.48

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Solution

The fourth proportional to 638,959.08, 958,078.98 and 212,266.48 is: 318,280.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,959.08 : 958,078.98 = 212,266.48 : x
  2. Step 2: Convert to fraction form
    638,959.08/958,078.98 = 212,266.48/x
  3. Step 3: Cross multiply
    638,959.08x = 958,078.98 × 212,266.48
  4. Step 4: Simplify right side
    638,959.08x = 203,368,052,646.59
  5. Step 5: Solve for x
    x = 203,368,052,646.59/638,959.08
  6. Step 6: Final answer
    x = 318,280.25

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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.