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Finding the Fourth Proportional to 648,309.40, 972,464.10 and 490,845.40

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Solution

The fourth proportional to 648,309.40, 972,464.10 and 490,845.40 is: 736,268.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,309.40 : 972,464.10 = 490,845.40 : x
  2. Step 2: Convert to fraction form
    648,309.40/972,464.10 = 490,845.40/x
  3. Step 3: Cross multiply
    648,309.40x = 972,464.10 × 490,845.40
  4. Step 4: Simplify right side
    648,309.40x = 477,329,530,150.14
  5. Step 5: Solve for x
    x = 477,329,530,150.14/648,309.40
  6. Step 6: Final answer
    x = 736,268.10

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Half scale
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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.