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Finding the Fourth Proportional to 975.80, 1,346.60 and 602.69

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Solution

The fourth proportional to 975.80, 1,346.60 and 602.69 is: 831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.80 : 1,346.60 = 602.69 : x
  2. Step 2: Convert to fraction form
    975.80/1,346.60 = 602.69/x
  3. Step 3: Cross multiply
    975.80x = 1,346.60 × 602.69
  4. Step 4: Simplify right side
    975.80x = 811,582.35
  5. Step 5: Solve for x
    x = 811,582.35/975.80
  6. Step 6: Final answer
    x = 831.71

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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.