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Finding the Fourth Proportional to 818.48, 1,129.08 and 507.44

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Solution

The fourth proportional to 818.48, 1,129.08 and 507.44 is: 700.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.48 : 1,129.08 = 507.44 : x
  2. Step 2: Convert to fraction form
    818.48/1,129.08 = 507.44/x
  3. Step 3: Cross multiply
    818.48x = 1,129.08 × 507.44
  4. Step 4: Simplify right side
    818.48x = 572,940.36
  5. Step 5: Solve for x
    x = 572,940.36/818.48
  6. Step 6: Final answer
    x = 700.01

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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.