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Finding the Fourth Proportional to 978,383.10, 1,467,574.65 and 418,511.10

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Solution

The fourth proportional to 978,383.10, 1,467,574.65 and 418,511.10 is: 627,766.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,383.10 : 1,467,574.65 = 418,511.10 : x
  2. Step 2: Convert to fraction form
    978,383.10/1,467,574.65 = 418,511.10/x
  3. Step 3: Cross multiply
    978,383.10x = 1,467,574.65 × 418,511.10
  4. Step 4: Simplify right side
    978,383.10x = 614,196,281,103.62
  5. Step 5: Solve for x
    x = 614,196,281,103.62/978,383.10
  6. Step 6: Final answer
    x = 627,766.65

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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.