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Finding the Fourth Proportional to 648,015.30, 972,022.95 and 396,072.90

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Solution

The fourth proportional to 648,015.30, 972,022.95 and 396,072.90 is: 594,109.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,015.30 : 972,022.95 = 396,072.90 : x
  2. Step 2: Convert to fraction form
    648,015.30/972,022.95 = 396,072.90/x
  3. Step 3: Cross multiply
    648,015.30x = 972,022.95 × 396,072.90
  4. Step 4: Simplify right side
    648,015.30x = 384,991,948,673.06
  5. Step 5: Solve for x
    x = 384,991,948,673.06/648,015.30
  6. Step 6: Final answer
    x = 594,109.35

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Double scale
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Similar ratio
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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.