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Finding the Fourth Proportional to 1,657.21, 2,485.38 and 876.16

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Solution

The fourth proportional to 1,657.21, 2,485.38 and 876.16 is: 1,314.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.21 : 2,485.38 = 876.16 : x
  2. Step 2: Convert to fraction form
    1,657.21/2,485.38 = 876.16/x
  3. Step 3: Cross multiply
    1,657.21x = 2,485.38 × 876.16
  4. Step 4: Simplify right side
    1,657.21x = 2,177,590.54
  5. Step 5: Solve for x
    x = 2,177,590.54/1,657.21
  6. Step 6: Final answer
    x = 1,314.01

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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.