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Finding the Fourth Proportional to 750.51, 1,123.94 and 424.89

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Solution

The fourth proportional to 750.51, 1,123.94 and 424.89 is: 636.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.51 : 1,123.94 = 424.89 : x
  2. Step 2: Convert to fraction form
    750.51/1,123.94 = 424.89/x
  3. Step 3: Cross multiply
    750.51x = 1,123.94 × 424.89
  4. Step 4: Simplify right side
    750.51x = 477,548.74
  5. Step 5: Solve for x
    x = 477,548.74/750.51
  6. Step 6: Final answer
    x = 636.30

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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.