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Finding the Fourth Proportional to 672.64, 1,009.28 and 503.04

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Solution

The fourth proportional to 672.64, 1,009.28 and 503.04 is: 754.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.64 : 1,009.28 = 503.04 : x
  2. Step 2: Convert to fraction form
    672.64/1,009.28 = 503.04/x
  3. Step 3: Cross multiply
    672.64x = 1,009.28 × 503.04
  4. Step 4: Simplify right side
    672.64x = 507,708.21
  5. Step 5: Solve for x
    x = 507,708.21/672.64
  6. Step 6: Final answer
    x = 754.80

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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.