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Finding the Fourth Proportional to 975.35, 1,345.98 and 577.29

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Solution

The fourth proportional to 975.35, 1,345.98 and 577.29 is: 796.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.35 : 1,345.98 = 577.29 : x
  2. Step 2: Convert to fraction form
    975.35/1,345.98 = 577.29/x
  3. Step 3: Cross multiply
    975.35x = 1,345.98 × 577.29
  4. Step 4: Simplify right side
    975.35x = 777,011.78
  5. Step 5: Solve for x
    x = 777,011.78/975.35
  6. Step 6: Final answer
    x = 796.65

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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.