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Finding the Fourth Proportional to 669.04, 925.80 and 570.64

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Solution

The fourth proportional to 669.04, 925.80 and 570.64 is: 789.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.04 : 925.80 = 570.64 : x
  2. Step 2: Convert to fraction form
    669.04/925.80 = 570.64/x
  3. Step 3: Cross multiply
    669.04x = 925.80 × 570.64
  4. Step 4: Simplify right side
    669.04x = 528,298.51
  5. Step 5: Solve for x
    x = 528,298.51/669.04
  6. Step 6: Final answer
    x = 789.64

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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.