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Finding the Fourth Proportional to 1,459.16, 2,013.80 and 869.68

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Solution

The fourth proportional to 1,459.16, 2,013.80 and 869.68 is: 1,200.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,459.16 : 2,013.80 = 869.68 : x
  2. Step 2: Convert to fraction form
    1,459.16/2,013.80 = 869.68/x
  3. Step 3: Cross multiply
    1,459.16x = 2,013.80 × 869.68
  4. Step 4: Simplify right side
    1,459.16x = 1,751,361.58
  5. Step 5: Solve for x
    x = 1,751,361.58/1,459.16
  6. Step 6: Final answer
    x = 1,200.25

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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.