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Finding the Fourth Proportional to 970.18, 1,338.45 and 576.82

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Solution

The fourth proportional to 970.18, 1,338.45 and 576.82 is: 795.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.18 : 1,338.45 = 576.82 : x
  2. Step 2: Convert to fraction form
    970.18/1,338.45 = 576.82/x
  3. Step 3: Cross multiply
    970.18x = 1,338.45 × 576.82
  4. Step 4: Simplify right side
    970.18x = 772,044.73
  5. Step 5: Solve for x
    x = 772,044.73/970.18
  6. Step 6: Final answer
    x = 795.77

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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.