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Finding the Fourth Proportional to 426,330.30, 638,266.65 and 260,442.30

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Solution

The fourth proportional to 426,330.30, 638,266.65 and 260,442.30 is: 389,912.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,330.30 : 638,266.65 = 260,442.30 : x
  2. Step 2: Convert to fraction form
    426,330.30/638,266.65 = 260,442.30/x
  3. Step 3: Cross multiply
    426,330.30x = 638,266.65 × 260,442.30
  4. Step 4: Simplify right side
    426,330.30x = 166,231,634,339.30
  5. Step 5: Solve for x
    x = 166,231,634,339.30/426,330.30
  6. Step 6: Final answer
    x = 389,912.78

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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.