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Finding the Fourth Proportional to 448,023.60, 672,035.40 and 418,280.40

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Solution

The fourth proportional to 448,023.60, 672,035.40 and 418,280.40 is: 627,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,023.60 : 672,035.40 = 418,280.40 : x
  2. Step 2: Convert to fraction form
    448,023.60/672,035.40 = 418,280.40/x
  3. Step 3: Cross multiply
    448,023.60x = 672,035.40 × 418,280.40
  4. Step 4: Simplify right side
    448,023.60x = 281,099,235,926.16
  5. Step 5: Solve for x
    x = 281,099,235,926.16/448,023.60
  6. Step 6: Final answer
    x = 627,420.60

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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.