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Finding the Fourth Proportional to 975.39, 1,346.07 and 555.76

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Solution

The fourth proportional to 975.39, 1,346.07 and 555.76 is: 766.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.39 : 1,346.07 = 555.76 : x
  2. Step 2: Convert to fraction form
    975.39/1,346.07 = 555.76/x
  3. Step 3: Cross multiply
    975.39x = 1,346.07 × 555.76
  4. Step 4: Simplify right side
    975.39x = 748,092.50
  5. Step 5: Solve for x
    x = 748,092.50/975.39
  6. Step 6: Final answer
    x = 766.97

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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.