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Finding the Fourth Proportional to 1,012.64, 1,518.14 and 647.33

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Solution

The fourth proportional to 1,012.64, 1,518.14 and 647.33 is: 970.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.64 : 1,518.14 = 647.33 : x
  2. Step 2: Convert to fraction form
    1,012.64/1,518.14 = 647.33/x
  3. Step 3: Cross multiply
    1,012.64x = 1,518.14 × 647.33
  4. Step 4: Simplify right side
    1,012.64x = 982,726.74
  5. Step 5: Solve for x
    x = 982,726.74/1,012.64
  6. Step 6: Final answer
    x = 970.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.