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Finding the Fourth Proportional to 822.12, 1,134.76 and 507.48

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Solution

The fourth proportional to 822.12, 1,134.76 and 507.48 is: 700.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.12 : 1,134.76 = 507.48 : x
  2. Step 2: Convert to fraction form
    822.12/1,134.76 = 507.48/x
  3. Step 3: Cross multiply
    822.12x = 1,134.76 × 507.48
  4. Step 4: Simplify right side
    822.12x = 575,868.00
  5. Step 5: Solve for x
    x = 575,868.00/822.12
  6. Step 6: Final answer
    x = 700.47

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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.