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Finding the Fourth Proportional to 1,416.98, 1,955.54 and 857.48

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Solution

The fourth proportional to 1,416.98, 1,955.54 and 857.48 is: 1,183.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.98 : 1,955.54 = 857.48 : x
  2. Step 2: Convert to fraction form
    1,416.98/1,955.54 = 857.48/x
  3. Step 3: Cross multiply
    1,416.98x = 1,955.54 × 857.48
  4. Step 4: Simplify right side
    1,416.98x = 1,676,828.81
  5. Step 5: Solve for x
    x = 1,676,828.81/1,416.98
  6. Step 6: Final answer
    x = 1,183.38

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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.