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Finding the Fourth Proportional to 753.41, 1,128.57 and 558.81

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Solution

The fourth proportional to 753.41, 1,128.57 and 558.81 is: 837.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.41 : 1,128.57 = 558.81 : x
  2. Step 2: Convert to fraction form
    753.41/1,128.57 = 558.81/x
  3. Step 3: Cross multiply
    753.41x = 1,128.57 × 558.81
  4. Step 4: Simplify right side
    753.41x = 630,656.20
  5. Step 5: Solve for x
    x = 630,656.20/753.41
  6. Step 6: Final answer
    x = 837.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.