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Finding the Fourth Proportional to 673.86, 1,009.08 and 400.16

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Solution

The fourth proportional to 673.86, 1,009.08 and 400.16 is: 599.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.86 : 1,009.08 = 400.16 : x
  2. Step 2: Convert to fraction form
    673.86/1,009.08 = 400.16/x
  3. Step 3: Cross multiply
    673.86x = 1,009.08 × 400.16
  4. Step 4: Simplify right side
    673.86x = 403,788.41
  5. Step 5: Solve for x
    x = 403,788.41/673.86
  6. Step 6: Final answer
    x = 599.22

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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.