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Finding the Fourth Proportional to 914.76, 1,260.90 and 620.46

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Solution

The fourth proportional to 914.76, 1,260.90 and 620.46 is: 855.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.76 : 1,260.90 = 620.46 : x
  2. Step 2: Convert to fraction form
    914.76/1,260.90 = 620.46/x
  3. Step 3: Cross multiply
    914.76x = 1,260.90 × 620.46
  4. Step 4: Simplify right side
    914.76x = 782,338.01
  5. Step 5: Solve for x
    x = 782,338.01/914.76
  6. Step 6: Final answer
    x = 855.24

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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.