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Finding the Fourth Proportional to 954.63, 1,317.56 and 618.95

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Solution

The fourth proportional to 954.63, 1,317.56 and 618.95 is: 854.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.63 : 1,317.56 = 618.95 : x
  2. Step 2: Convert to fraction form
    954.63/1,317.56 = 618.95/x
  3. Step 3: Cross multiply
    954.63x = 1,317.56 × 618.95
  4. Step 4: Simplify right side
    954.63x = 815,503.76
  5. Step 5: Solve for x
    x = 815,503.76/954.63
  6. Step 6: Final answer
    x = 854.26

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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.