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Finding the Fourth Proportional to 882.48, 1,315.95 and 820.92

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Solution

The fourth proportional to 882.48, 1,315.95 and 820.92 is: 1,224.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.48 : 1,315.95 = 820.92 : x
  2. Step 2: Convert to fraction form
    882.48/1,315.95 = 820.92/x
  3. Step 3: Cross multiply
    882.48x = 1,315.95 × 820.92
  4. Step 4: Simplify right side
    882.48x = 1,080,289.67
  5. Step 5: Solve for x
    x = 1,080,289.67/882.48
  6. Step 6: Final answer
    x = 1,224.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.