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Finding the Fourth Proportional to 882.42, 1,217.70 and 509.47

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Solution

The fourth proportional to 882.42, 1,217.70 and 509.47 is: 703.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.42 : 1,217.70 = 509.47 : x
  2. Step 2: Convert to fraction form
    882.42/1,217.70 = 509.47/x
  3. Step 3: Cross multiply
    882.42x = 1,217.70 × 509.47
  4. Step 4: Simplify right side
    882.42x = 620,381.62
  5. Step 5: Solve for x
    x = 620,381.62/882.42
  6. Step 6: Final answer
    x = 703.05

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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.