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Finding the Fourth Proportional to 660.30, 910.85 and 435.79

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Solution

The fourth proportional to 660.30, 910.85 and 435.79 is: 601.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.30 : 910.85 = 435.79 : x
  2. Step 2: Convert to fraction form
    660.30/910.85 = 435.79/x
  3. Step 3: Cross multiply
    660.30x = 910.85 × 435.79
  4. Step 4: Simplify right side
    660.30x = 396,939.32
  5. Step 5: Solve for x
    x = 396,939.32/660.30
  6. Step 6: Final answer
    x = 601.15

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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.