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Finding the Fourth Proportional to 747.03, 1,030.92 and 485.49

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Solution

The fourth proportional to 747.03, 1,030.92 and 485.49 is: 669.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.03 : 1,030.92 = 485.49 : x
  2. Step 2: Convert to fraction form
    747.03/1,030.92 = 485.49/x
  3. Step 3: Cross multiply
    747.03x = 1,030.92 × 485.49
  4. Step 4: Simplify right side
    747.03x = 500,501.35
  5. Step 5: Solve for x
    x = 500,501.35/747.03
  6. Step 6: Final answer
    x = 669.99

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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.