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Finding the Fourth Proportional to 975.57, 1,346.25 and 555.95

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Solution

The fourth proportional to 975.57, 1,346.25 and 555.95 is: 767.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.57 : 1,346.25 = 555.95 : x
  2. Step 2: Convert to fraction form
    975.57/1,346.25 = 555.95/x
  3. Step 3: Cross multiply
    975.57x = 1,346.25 × 555.95
  4. Step 4: Simplify right side
    975.57x = 748,440.96
  5. Step 5: Solve for x
    x = 748,440.96/975.57
  6. Step 6: Final answer
    x = 767.18

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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.