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Finding the Fourth Proportional to 732.60, 1,011.80 and 485.06

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Solution

The fourth proportional to 732.60, 1,011.80 and 485.06 is: 669.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.60 : 1,011.80 = 485.06 : x
  2. Step 2: Convert to fraction form
    732.60/1,011.80 = 485.06/x
  3. Step 3: Cross multiply
    732.60x = 1,011.80 × 485.06
  4. Step 4: Simplify right side
    732.60x = 490,779.86
  5. Step 5: Solve for x
    x = 490,779.86/732.60
  6. Step 6: Final answer
    x = 669.92

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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.