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Finding the Fourth Proportional to 660,665.56, 910,850.91 and 476,749.78

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Solution

The fourth proportional to 660,665.56, 910,850.91 and 476,749.78 is: 657,288.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,665.56 : 910,850.91 = 476,749.78 : x
  2. Step 2: Convert to fraction form
    660,665.56/910,850.91 = 476,749.78/x
  3. Step 3: Cross multiply
    660,665.56x = 910,850.91 × 476,749.78
  4. Step 4: Simplify right side
    660,665.56x = 434,247,970,955.30
  5. Step 5: Solve for x
    x = 434,247,970,955.30/660,665.56
  6. Step 6: Final answer
    x = 657,288.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.