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Finding the Fourth Proportional to 875.14, 1,311.28 and 510.24

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Solution

The fourth proportional to 875.14, 1,311.28 and 510.24 is: 764.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.14 : 1,311.28 = 510.24 : x
  2. Step 2: Convert to fraction form
    875.14/1,311.28 = 510.24/x
  3. Step 3: Cross multiply
    875.14x = 1,311.28 × 510.24
  4. Step 4: Simplify right side
    875.14x = 669,067.51
  5. Step 5: Solve for x
    x = 669,067.51/875.14
  6. Step 6: Final answer
    x = 764.53

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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.