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Finding the Fourth Proportional to 673.74, 929.64 and 438.02

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Solution

The fourth proportional to 673.74, 929.64 and 438.02 is: 604.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.74 : 929.64 = 438.02 : x
  2. Step 2: Convert to fraction form
    673.74/929.64 = 438.02/x
  3. Step 3: Cross multiply
    673.74x = 929.64 × 438.02
  4. Step 4: Simplify right side
    673.74x = 407,196.26
  5. Step 5: Solve for x
    x = 407,196.26/673.74
  6. Step 6: Final answer
    x = 604.38

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1.5x scale

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.