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Finding the Fourth Proportional to 882.81, 1,218.14 and 509.75

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Solution

The fourth proportional to 882.81, 1,218.14 and 509.75 is: 703.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.81 : 1,218.14 = 509.75 : x
  2. Step 2: Convert to fraction form
    882.81/1,218.14 = 509.75/x
  3. Step 3: Cross multiply
    882.81x = 1,218.14 × 509.75
  4. Step 4: Simplify right side
    882.81x = 620,946.87
  5. Step 5: Solve for x
    x = 620,946.87/882.81
  6. Step 6: Final answer
    x = 703.38

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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.